![R1.1.4 Lab: Determination of the Enthalpy of Combustion of Ethanol [SL IB CHEMISTRY]](/vi/OYwEMFK8XlA/hqdefault.jpg?sqp=-oaymwEjCNACELwBSFryq4qpAxUIARUAAAAAGAElAADIQj0AgKJDeAE=&rs=AOn4CLBdNHvhmtO1ocZ8Ctz_JJsfktVJKg)
Richard Thornley
R1.1.4 Lab: Determination of the Enthalpy of Combustion of Ethanol [SL IB CHEMISTRY]
23:41
![R1.1.4 Two Calorimetry Experiments - Overview [SL IB CHEMISTRY]](/vi/iTGpGcoOYa8/hqdefault.jpg?sqp=-oaymwE9CNACELwBSFryq4qpAy8IARUAAAAAGAElAADIQj0AgKJDeAHwAQH4Af4JgALQBYoCDAgAEAEYZSBlKGUwDw==&rs=AOn4CLCCQbSec4-Z37_e_XcOHJQ9TUb7ug)
Richard Thornley
R1.1.4 Two Calorimetry Experiments - Overview [SL IB CHEMISTRY]
2:10
![R1.1.4 Q=mcdeltaT [SL IB CHEMISTRY]](/vi/mw991_A0ALc/hqdefault.jpg?sqp=-oaymwEjCNACELwBSFryq4qpAxUIARUAAAAAGAElAADIQj0AgKJDeAE=&rs=AOn4CLBc3Zrm2Kv50vizCe_tCJamxg0w_w)
Richard Thornley
R1.1.4 Q=mcdeltaT [SL IB CHEMISTRY]
8:51
Richard Thornley
R1.1.2 Energy Transfer: System and Surroundings
1:47
![S3.2.2 Functional groups For IB plus Questions and IMF [SL IB CHEMISTRY]](/vi/dG7rXRbQD-A/hqdefault.jpg?sqp=-oaymwEjCNACELwBSFryq4qpAxUIARUAAAAAGAElAADIQj0AgKJDeAE=&rs=AOn4CLB-26ZI-Y0QIl-g-fFFAS207OnHxg)
Richard Thornley
S3.2.2 Functional groups For IB plus Questions and IMF [SL IB CHEMISTRY]
14:54
![S2.3.3 Transition metal elements have delocalized d-electrons (mpt & conductivity) [HL IB CHEMISTRY]](/vi/h-8WULFFNoI/hqdefault.jpg?sqp=-oaymwEjCNACELwBSFryq4qpAxUIARUAAAAAGAElAADIQj0AgKJDeAE=&rs=AOn4CLA5VMbYGQ77XR5hOl5e24cthgFBrw)
Richard Thornley
S2.3.3 Transition metal elements have delocalized d-electrons (mpt & conductivity) [HL IB CHEMISTRY]
2:43
![S3.1 Oxidation states of Carbon in CH4 , CH3OH, HCHO, HCOOH, CO2 [SL IB CHEMISTRY]](/vi/y0j6LaudAow/hqdefault.jpg?sqp=-oaymwEjCNACELwBSFryq4qpAxUIARUAAAAAGAElAADIQj0AgKJDeAE=&rs=AOn4CLCv10Skdsm4wMamvBqPmpajcMzJ1g)
Richard Thornley
S3.1 Oxidation states of Carbon in CH4 , CH3OH, HCHO, HCOOH, CO2 [SL IB CHEMISTRY]
3:10
Richard Thornley
S2.1 Radical Atoms, Molecules and Ions
7:37
![S2.2 Do allotropes such as diamond and graphite have different ΔH f⦵ values? [SL IB CHEMISTRY]](/vi/_IJja4ePMvs/hqdefault.jpg?sqp=-oaymwEjCNACELwBSFryq4qpAxUIARUAAAAAGAElAADIQj0AgKJDeAE=&rs=AOn4CLAPOUll0RGxbsCeXrmxM3IHGN5xWA)
Richard Thornley
S2.2 Do allotropes such as diamond and graphite have different ΔH f⦵ values? [SL IB CHEMISTRY]
2:48
![R3.1.2 Conjugate acid-base pairs differ by a single proton [SL IB CHEMISTRY]](/vi/M1SWsT5nugo/hqdefault.jpg?sqp=-oaymwEjCNACELwBSFryq4qpAxUIARUAAAAAGAElAADIQj0AgKJDeAE=&rs=AOn4CLAWmdVPNwlhW0ikeQuhnrONhT1ZBg)
Richard Thornley
R3.1.2 Conjugate acid-base pairs differ by a single proton [SL IB CHEMISTRY]
3:30
![R1.2 Why do CFCs break down to release chlorine radicals not fluorine radicals? [SL IB CHEMISTRY]](/vi/Bi4LPUTYQi4/hqdefault.jpg?sqp=-oaymwEjCNACELwBSFryq4qpAxUIARUAAAAAGAElAADIQj0AgKJDeAE=&rs=AOn4CLCQXIH625i2aOIH_NOf02gQPI4MuQ)
Richard Thornley
R1.2 Why do CFCs break down to release chlorine radicals not fluorine radicals? [SL IB CHEMISTRY]
2:04
![S2.2 Do coordination bonds have different properties from other covalent bonds? [SL IB CHEMISTRY]](/vi/Fu9tfMbBjAk/hqdefault.jpg?sqp=-oaymwEjCNACELwBSFryq4qpAxUIARUAAAAAGAElAADIQj0AgKJDeAE=&rs=AOn4CLDvZH6TR9eHEhojdptXT_TAQYyJCA)
Richard Thornley
S2.2 Do coordination bonds have different properties from other covalent bonds? [SL IB CHEMISTRY]
1:25
![R3.4 Some reactions of alkenes are reduction, others are electrophilic addition [SL IB CHEMISTRY]](/vi/WdnDRPEr1mQ/hqdefault.jpg?sqp=-oaymwEjCNACELwBSFryq4qpAxUIARUAAAAAGAElAADIQj0AgKJDeAE=&rs=AOn4CLA1BmIA5ERkxidE8PlwdnrTsuV1LQ)
Richard Thornley
R3.4 Some reactions of alkenes are reduction, others are electrophilic addition [SL IB CHEMISTRY]
4:42
![R2.1.5 Atom Economy Calculations [SL IB CHEMISTRY]](/vi/pzzeEIKhFmw/hqdefault.jpg?sqp=-oaymwEjCNACELwBSFryq4qpAxUIARUAAAAAGAElAADIQj0AgKJDeAE=&rs=AOn4CLBR88HefGXbAvWUpo7xWWnUEmauxw)
Richard Thornley
R2.1.5 Atom Economy Calculations [SL IB CHEMISTRY]
3:30
Richard Thornley
Playing with Prompts and Luma Dream Machine AI Video Generator
1:19
![R2.2 Why is high activation energy considered to be a useful property of a fuel? [SL IB CHEMISTRY]](/vi/p5FW6m6RoKU/hqdefault.jpg?sqp=-oaymwEjCNACELwBSFryq4qpAxUIARUAAAAAGAElAADIQj0AgKJDeAE=&rs=AOn4CLBMM1OveDtjC_F095BR-DgyyHzBeg)
Richard Thornley
R2.2 Why is high activation energy considered to be a useful property of a fuel? [SL IB CHEMISTRY]
3:20
![S.1.3.6 Limit of Convergence Calculations [HL IB CHEMISTRY]](/vi/KXh61XvdiPc/hqdefault.jpg?sqp=-oaymwEjCNACELwBSFryq4qpAxUIARUAAAAAGAElAADIQj0AgKJDeAE=&rs=AOn4CLA4xP9uMrilyyCSduQzT0MhJ7LvHQ)
Richard Thornley
S.1.3.6 Limit of Convergence Calculations [HL IB CHEMISTRY]
11:01
![R2.2 Why are alkanes kinetically stable but thermodynamically unstable? [HL IB CHEMISTRY]](/vi/ZAHNBlyVMOc/hqdefault.jpg?sqp=-oaymwEjCNACELwBSFryq4qpAxUIARUAAAAAGAElAADIQj0AgKJDeAE=&rs=AOn4CLAHFjjKe6DlcoIjIsTekKDbmNcAaA)
Richard Thornley
R2.2 Why are alkanes kinetically stable but thermodynamically unstable? [HL IB CHEMISTRY]
3:46
![S1.5.2 Real versus Ideal Gases [SL IB CHEMISTRY]](/vi/k08_0UIFtXg/hqdefault.jpg?sqp=-oaymwEjCNACELwBSFryq4qpAxUIARUAAAAAGAElAADIQj0AgKJDeAE=&rs=AOn4CLD1WIFd9avzGQxOoP9dwAGCUlE-9w)
Richard Thornley
S1.5.2 Real versus Ideal Gases [SL IB CHEMISTRY]
3:33
![S1.5.4 Lab: Determining Absolute Zero (Charles's Law) [SL IB CHEMISTRY]](/vi/qtkPkLkXKkw/hqdefault.jpg?sqp=-oaymwE9CNACELwBSFryq4qpAy8IARUAAAAAGAElAADIQj0AgKJDeAHwAQH4Ac4FgAKACooCDAgAEAEYbCBsKGwwDw==&rs=AOn4CLDQKDc_2hIe5erD57HRUY1CXPwI4w)
Richard Thornley
S1.5.4 Lab: Determining Absolute Zero (Charles's Law) [SL IB CHEMISTRY]
0:58
![R.3.4.8 Deduce the charge on a complex ion, given the formula of ion & ligands [HL IB CHEMISTRY]](/vi/Jbt4UNseDlk/hqdefault.jpg?sqp=-oaymwEjCNACELwBSFryq4qpAxUIARUAAAAAGAElAADIQj0AgKJDeAE=&rs=AOn4CLD1OfD4ANtvBMt9Wrz2hp9bTnp-lQ)
Richard Thornley
R.3.4.8 Deduce the charge on a complex ion, given the formula of ion & ligands [HL IB CHEMISTRY]
2:20
![R2.2 Differences between the energy profiles for SN1 and SN2 reactions [HL IB CHEMISTRY]](/vi/BuRFGKFKYXw/hqdefault.jpg?sqp=-oaymwEjCNACELwBSFryq4qpAxUIARUAAAAAGAElAADIQj0AgKJDeAE=&rs=AOn4CLCsBXWkio7nMCtN3Mb0EMaeNqMM8Q)
Richard Thornley
R2.2 Differences between the energy profiles for SN1 and SN2 reactions [HL IB CHEMISTRY]
5:59
Richard Thornley
Something in my Ali Express haul is (ironically) radioactive (really) pt 1 #science
1:00
Richard Thornley
Tool 1:08 Measuring Potential Difference (voltage)
1:40
![R2.2 Why are alkanes kinetically stable but thermodynamically unstable? [SL IB CHEMISTRY]](/vi/pnbUYU5ymjk/hqdefault.jpg?sqp=-oaymwEjCNACELwBSFryq4qpAxUIARUAAAAAGAElAADIQj0AgKJDeAE=&rs=AOn4CLD8DxH00a2BBTDNI-_IFmUCCu1R5A)
Richard Thornley
R2.2 Why are alkanes kinetically stable but thermodynamically unstable? [SL IB CHEMISTRY]
3:12
![S3.1 Why are Si-Si bonds generally weaker than C-C bonds? [SL IB CHEMISTRY]](/vi/0iuo50BC3NY/hqdefault.jpg?sqp=-oaymwEjCNACELwBSFryq4qpAxUIARUAAAAAGAElAADIQj0AgKJDeAE=&rs=AOn4CLD496QsVZ-c_aJQI6CHcJiVXBqw1w)
Richard Thornley
S3.1 Why are Si-Si bonds generally weaker than C-C bonds? [SL IB CHEMISTRY]
2:23
Richard Thornley
Quick Demo: Nitrogen oxides equilibrium (R2.3.3)
1:00
![S1.1 Why does a Perfect Crystal at Zero Kelvin have Zero Entropy ? [HL IB CHEMISTRY]](/vi/6JA0Sk0oecQ/hqdefault.jpg?sqp=-oaymwEjCNACELwBSFryq4qpAxUIARUAAAAAGAElAADIQj0AgKJDeAE=&rs=AOn4CLDwjoqolcqKnX_avH_fDbaO7fSSBQ)
Richard Thornley
S1.1 Why does a Perfect Crystal at Zero Kelvin have Zero Entropy ? [HL IB CHEMISTRY]
0:43
![R3.4 Isotopic Tracers and Reaction Mechanisms [HL IB CHEMISTRY]](/vi/UXqyvk69Dw0/hqdefault.jpg?sqp=-oaymwEjCNACELwBSFryq4qpAxUIARUAAAAAGAElAADIQj0AgKJDeAE=&rs=AOn4CLBl0Q08DkjH_zD4_OxSWTNF6kllYQ)
Richard Thornley
R3.4 Isotopic Tracers and Reaction Mechanisms [HL IB CHEMISTRY]
1:32
![S3.1.5 Reactions with water of the oxides of grp 1/2 metals, carbon and sulfur [SL IB CHEMISTRY]](/vi/e4HooN2IUHo/hqdefault.jpg?sqp=-oaymwEjCNACELwBSFryq4qpAxUIARUAAAAAGAElAADIQj0AgKJDeAE=&rs=AOn4CLBq8M7_INsLh5n26astibxf7c2jaQ)
Richard Thornley
S3.1.5 Reactions with water of the oxides of grp 1/2 metals, carbon and sulfur [SL IB CHEMISTRY]
1:24
Richard Thornley
Tool 1:21 Melting point Determination
0:46
![S1.1.1 Can you Identify Atoms, Elements, Molecules, Compounds and Mixtures? [SL IB CHEMISTRY]](/vi/FYqYT1PoxdQ/hqdefault.jpg?sqp=-oaymwE9CNACELwBSFryq4qpAy8IARUAAAAAGAElAADIQj0AgKJDeAHwAQH4Af4JgALQBYoCDAgAEAEYSSBlKDcwDw==&rs=AOn4CLDQDpn76E6ho6aoOkYNNOgPYxFRJg)
Richard Thornley
S1.1.1 Can you Identify Atoms, Elements, Molecules, Compounds and Mixtures? [SL IB CHEMISTRY]
1:41
Richard Thornley
Quick Demo: Bottle Rocket
0:48
Richard Thornley
Quick Demo: Bunsen Bomb
0:49
Richard Thornley
Tool 1:04 Measuring Temperature (analog/digital uncertainties)
0:42
Richard Thornley
Tool 1:01 Measuring Mass (analog/digital uncertainties)
0:55
Richard Thornley
Tool 1:05 Measuring Length (analog/digital)
0:39
Richard Thornley
Catalytic Oxidation of Propanone by Copper + Equations #chemistry #education #science
1:00
![R3.4.13 Mechanism of Electrophilic Substitution of Benzene [HL IB Chemistry]](/vi/WVcmhlidK2Q/hqdefault.jpg?sqp=-oaymwEjCNACELwBSFryq4qpAxUIARUAAAAAGAElAADIQj0AgKJDeAE=&rs=AOn4CLCM6KuIHEqZxW2z7JjjqEssIu6weg)
Richard Thornley
R3.4.13 Mechanism of Electrophilic Substitution of Benzene [HL IB Chemistry]
6:55
![Specimen SL Multiple Choice Paper 1A / Model Answers (New syllabus 2025 onwards) [SL IB Chemistry]](/vi/DZlxvSt4bG8/hqdefault.jpg?sqp=-oaymwEjCNACELwBSFryq4qpAxUIARUAAAAAGAElAADIQj0AgKJDeAE=&rs=AOn4CLCRmrnjjrTO9IhHrrvGVB5tGj4NVw)
Richard Thornley
Specimen SL Multiple Choice Paper 1A / Model Answers (New syllabus 2025 onwards) [SL IB Chemistry]
42:22
Richard Thornley
Essential Nucleophilic/Electrophilic/Free Radical Additions and Substitution Reactions !
3:10
![S.3.2 What makes a Polymer Biodegradable ? [SL IB CHEMISTRY]](/vi/yVHMwwxJuAk/hqdefault.jpg?sqp=-oaymwEjCNACELwBSFryq4qpAxUIARUAAAAAGAElAADIQj0AgKJDeAE=&rs=AOn4CLAvWBnVJJszRtrtmrvjT11UuVapeQ)
Richard Thornley
S.3.2 What makes a Polymer Biodegradable ? [SL IB CHEMISTRY]
4:00
![S3.2.12 Interpret IR, Mass Spec and H NMR Data in Structural Analysis [HL IB CHEMISTRY]](/vi/g6w_capJ-p8/hqdefault.jpg?sqp=-oaymwEjCNACELwBSFryq4qpAxUIARUAAAAAGAElAADIQj0AgKJDeAE=&rs=AOn4CLDrT6qOU810PEF0EmoRXjafk8eHCg)
Richard Thornley
S3.2.12 Interpret IR, Mass Spec and H NMR Data in Structural Analysis [HL IB CHEMISTRY]
10:46
![R.3.4.2 Nucleophilic Substitution Reactions [SL IB CHEMISTRY]](/vi/lmmCiPCwUA0/hqdefault.jpg?sqp=-oaymwEjCNACELwBSFryq4qpAxUIARUAAAAAGAElAADIQj0AgKJDeAE=&rs=AOn4CLAVCBwzxnIBF-y6fARUWBpAu2rQKw)
Richard Thornley
R.3.4.2 Nucleophilic Substitution Reactions [SL IB CHEMISTRY]
2:43
![R.3.4.1 Definition and Recognition of Nucleophiles [HL CHEMISTRY]](/vi/n3l-HsBmayY/hqdefault.jpg?sqp=-oaymwEjCNACELwBSFryq4qpAxUIARUAAAAAGAElAADIQj0AgKJDeAE=&rs=AOn4CLDF1Q6EV5NV_STdSG-o0oyyG9DRng)
Richard Thornley
R.3.4.1 Definition and Recognition of Nucleophiles [HL CHEMISTRY]
5:07
![R1.2.4 Standard Enthalpy of Combustion Calculations [HL IB CHEMISTRY]]](/vi/fNEqzfc9pdA/hqdefault.jpg?sqp=-oaymwEjCNACELwBSFryq4qpAxUIARUAAAAAGAElAADIQj0AgKJDeAE=&rs=AOn4CLAWbmBnvzEU937qrPaKotukIr_kLg)
Richard Thornley
R1.2.4 Standard Enthalpy of Combustion Calculations [HL IB CHEMISTRY]]
6:37
![R1.2.3 Standard Enthalpy Change of Formation and Combustion [HL IB Chemistry 2024]](/vi/Jq1y22ZNE84/hqdefault.jpg?sqp=-oaymwEjCNACELwBSFryq4qpAxUIARUAAAAAGAElAADIQj0AgKJDeAE=&rs=AOn4CLBzPCanmCgo83npMEmxi_I_XEwh9Q)
Richard Thornley
R1.2.3 Standard Enthalpy Change of Formation and Combustion [HL IB Chemistry 2024]
8:00
![R1.3.5 Three Types of Fuel Cells [SL IB Chemistry]](/vi/uzc6NIkvR7E/hqdefault.jpg?sqp=-oaymwEjCNACELwBSFryq4qpAxUIARUAAAAAGAElAADIQj0AgKJDeAE=&rs=AOn4CLAMysZ7uvZ6UP8qx5sxUAPUQW9BmA)
Richard Thornley
R1.3.5 Three Types of Fuel Cells [SL IB Chemistry]
5:15
![S3.2 Identification of Primary, Secondary and Tertiary Amines and Amides [SL IB CHEMISTRY]](/vi/_ScDWTIf0zQ/hqdefault.jpg?sqp=-oaymwEjCNACELwBSFryq4qpAxUIARUAAAAAGAElAADIQj0AgKJDeAE=&rs=AOn4CLAH_ZNmchaFwe6WfxEdnqdQb9BAtw)
Richard Thornley
S3.2 Identification of Primary, Secondary and Tertiary Amines and Amides [SL IB CHEMISTRY]
6:00
![R3.2.12 Standard Hydrogen Electrode (SHE) [HL IB Chemistry]](/vi/8McogY2OQg8/hqdefault.jpg?sqp=-oaymwEjCNACELwBSFryq4qpAxUIARUAAAAAGAElAADIQj0AgKJDeAE=&rs=AOn4CLBLhAd4jNSU-XDf1iywgUl6FkYvNQ)
Richard Thornley
R3.2.12 Standard Hydrogen Electrode (SHE) [HL IB Chemistry]
7:58
![S2.4.4 Describe the Common Properties of Plastics in Terms of Their Structure [SL Chemistry]](/vi/zNaq_5MaKds/hqdefault.jpg?sqp=-oaymwEjCNACELwBSFryq4qpAxUIARUAAAAAGAElAADIQj0AgKJDeAE=&rs=AOn4CLCb8QvFy5U0OxwG71gVJ4NHBcAgUg)
Richard Thornley
S2.4.4 Describe the Common Properties of Plastics in Terms of Their Structure [SL Chemistry]
5:58
![S1.4.5 Converting mol/dm^3 to g/dm^3 [SL IB CHEMISTRY]](/vi/vBK6ve2b58A/hqdefault.jpg?sqp=-oaymwEjCNACELwBSFryq4qpAxUIARUAAAAAGAElAADIQj0AgKJDeAE=&rs=AOn4CLAz6-GyhNsJ4bPW5URe6wPDDxAZrA)
Richard Thornley
S1.4.5 Converting mol/dm^3 to g/dm^3 [SL IB CHEMISTRY]
4:26
![S1.4.4 Using Experimental Combustion Data to Calculate Empirical/Molecular Formula [SL IB CHEMISTRY]](/vi/MjLCMT5w0VU/hqdefault.jpg?sqp=-oaymwEjCNACELwBSFryq4qpAxUIARUAAAAAGAElAADIQj0AgKJDeAE=&rs=AOn4CLBrHCSJ_fxnnmeQMoYX95ktGQ7ZkQ)
Richard Thornley
S1.4.4 Using Experimental Combustion Data to Calculate Empirical/Molecular Formula [SL IB CHEMISTRY]
4:48
![S2.3.1 Explain the electrical, thermal conductivity & malleability of metals [SL IB Chemistry]](/vi/S9KYKVjMYd0/hqdefault.jpg?sqp=-oaymwEjCNACELwBSFryq4qpAxUIARUAAAAAGAElAADIQj0AgKJDeAE=&rs=AOn4CLAVPjvFY0694xfRMXfqgwiUwuIoPw)
Richard Thornley
S2.3.1 Explain the electrical, thermal conductivity & malleability of metals [SL IB Chemistry]
3:43
![S1.3.3 Main energy level, n, has 2n orbitals & holds a maximum 2n^2 electrons. [SL IB CHEMISTRY]](/vi/0Js-7PNnDF8/hqdefault.jpg?sqp=-oaymwEjCNACELwBSFryq4qpAxUIARUAAAAAGAElAADIQj0AgKJDeAE=&rs=AOn4CLCdcy0EIeSaUqyUklm1ZavvmEiWww)
Richard Thornley
S1.3.3 Main energy level, n, has 2n orbitals & holds a maximum 2n^2 electrons. [SL IB CHEMISTRY]
2:11
![R2.2.6 Distinguish between intermediates & transition states in energy profiles [HL IB Chemistry]](/vi/GviQ0pLlBkM/hqdefault.jpg?sqp=-oaymwEjCNACELwBSFryq4qpAxUIARUAAAAAGAElAADIQj0AgKJDeAE=&rs=AOn4CLBMCS-8i6PDvzHnHHXyvKBmWiw2Cg)
Richard Thornley
R2.2.6 Distinguish between intermediates & transition states in energy profiles [HL IB Chemistry]
1:12
![S1.2.2 Perform calculations involving non-integer RAM and abundance of isotopes [SL IB Chemistry]](/vi/MLC6UA_2JF0/hqdefault.jpg?sqp=-oaymwEjCNACELwBSFryq4qpAxUIARUAAAAAGAElAADIQj0AgKJDeAE=&rs=AOn4CLCf_YDoRRhd_x5lSrRw4GsBoEQ7aA)
Richard Thornley
S1.2.2 Perform calculations involving non-integer RAM and abundance of isotopes [SL IB Chemistry]
6:39
![R2.2.4 The Boltzmann Distribution [SL IB Chemistry]](/vi/AHXJjQE2Wiw/hqdefault.jpg?sqp=-oaymwEjCNACELwBSFryq4qpAxUIARUAAAAAGAElAADIQj0AgKJDeAE=&rs=AOn4CLD3yH1LSqOOXVZVvrOSWSZ8m6U4VQ)
Richard Thornley
R2.2.4 The Boltzmann Distribution [SL IB Chemistry]
7:14
![S1.2.3 Interpretation of Mass Spectra of Isotopes [HL IB CHEMISTRY]](/vi/S_k6hib6u0s/hqdefault.jpg?sqp=-oaymwEjCNACELwBSFryq4qpAxUIARUAAAAAGAElAADIQj0AgKJDeAE=&rs=AOn4CLA2DW7vdZ4Rx7deGT8JcSO6PPBL_A)
Richard Thornley
S1.2.3 Interpretation of Mass Spectra of Isotopes [HL IB CHEMISTRY]
2:08
![S1.3.1 Distinguish between a continuous and a line spectrum [SL IB CHEMISTRY]](/vi/QTdLn5-HAt4/hqdefault.jpg?sqp=-oaymwEjCNACELwBSFryq4qpAxUIARUAAAAAGAElAADIQj0AgKJDeAE=&rs=AOn4CLAFakJwcvEjwcsKKQc0iNTP3kFT3Q)
Richard Thornley
S1.3.1 Distinguish between a continuous and a line spectrum [SL IB CHEMISTRY]
0:45
![S1.1.3 Temperature (K), Is A Measure Of Kinetic Energy (C / K Conversion) [SL IB CHEMISTRY]](/vi/qnubVZPVmcE/hqdefault.jpg?sqp=-oaymwEjCNACELwBSFryq4qpAxUIARUAAAAAGAElAADIQj0AgKJDeAE=&rs=AOn4CLCt5VW47_NgoSPh4Qeu32VO8jgcRQ)
Richard Thornley
S1.1.3 Temperature (K), Is A Measure Of Kinetic Energy (C / K Conversion) [SL IB CHEMISTRY]
3:16
![S1.2.2 What are the Differences in the Physical Properties of Isotopes? [SL IB Chemistry]](/vi/TQGgZOZWVNw/hqdefault.jpg?sqp=-oaymwEjCNACELwBSFryq4qpAxUIARUAAAAAGAElAADIQj0AgKJDeAE=&rs=AOn4CLAm5VZ-N0JEHeERkHRGjEh9Ivicsw)
Richard Thornley
S1.2.2 What are the Differences in the Physical Properties of Isotopes? [SL IB Chemistry]
3:05
Richard Thornley
S1E4 On Chemistry: Gamma Ray Bursters
0:43
Richard Thornley
S1E3 On Chemistry: Why eat the semi-metal antimony?
0:59
Richard Thornley
S1E2 On Chemistry: Where is the Best Place for Acid Rain to Fall?
0:55
Richard Thornley
S1E1 On Chemistry: Why is Glass Green?
1:00
![2021 May HL paper 1 TZ 1 [IB Chemistry] - solved/answered](/vi/tRybsE1cNDQ/hqdefault.jpg?sqp=-oaymwEjCNACELwBSFryq4qpAxUIARUAAAAAGAElAADIQj0AgKJDeAE=&rs=AOn4CLBCRbFPkXj0AmeMjTqUPVcnQK86yA)
Richard Thornley
2021 May HL paper 1 TZ 1 [IB Chemistry] - solved/answered
48:43
Richard Thornley
Explosive Safety Device
0:51
![2020 Nov SL Paper 3 - not options [IB Chemistry] ANSWERED/SOLVED](/vi/oT3xbOzdWmU/hqdefault.jpg?sqp=-oaymwEjCNACELwBSFryq4qpAxUIARUAAAAAGAElAADIQj0AgKJDeAE=&rs=AOn4CLD2Gw82hvt1f0Q--w9xIVo2zX0D1g)
Richard Thornley
2020 Nov SL Paper 3 - not options [IB Chemistry] ANSWERED/SOLVED
15:08
Richard Thornley
The Thief
0:12
![Lab: Back titration to determine the % CaCO3 in eggshell DATA COLLECTION [IB CHEMISTRY]](/vi/DjBXw7toD_0/hqdefault.jpg?sqp=-oaymwEjCNACELwBSFryq4qpAxUIARUAAAAAGAElAADIQj0AgKJDeAE=&rs=AOn4CLAb2_LGsyPbJ8bXjiptXWXCyUJoBg)
Richard Thornley
Lab: Back titration to determine the % CaCO3 in eggshell DATA COLLECTION [IB CHEMISTRY]
8:29
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Richard Thornley
2020 Nov HL Paper 1 [IB Chemistry] ANSWERED/SOLVED
49:58
Richard Thornley
Lab: Iron Tablet Titration (finding the mass of Fe/pill) DATA COLLECTION
8:50
Richard Thornley
AliExpress Mini Cards
0:34
Richard Thornley
Debulbed incandescent tungsten light in liquid nitrogen
0:21
Richard Thornley
Failure to Launch
0:12
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Richard Thornley
2017 May SL Paper 1 TZ2 [IB Chemistry] ANSWERED/SOLVED
36:15
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Richard Thornley
2019 May SL Paper 1 TZ 2 [IB Chemistry] - SOLVED
31:09
Richard Thornley
Entropy Bombs
1:49
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Richard Thornley
2020 Nov HL paper 2 (qu 2-7) [IB Chemistry] ANSWERED/SOLUTIONS
53:32
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Richard Thornley
2020 Nov HL paper 2 Qu 1 [IB Chemistry] - SOLUTIONS/ANSWERED
34:56
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Richard Thornley
2020 Nov SL paper 2 [IB Chemistry] - SOLUTIONS/ANSWERED
46:50
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Richard Thornley
2020 Nov SL paper 1 [IB Chemistry] ANSWERED
36:29
Richard Thornley
What links methane to an ancient weapon?
1:05
Richard Thornley
Tested by a Science Teacher: Timson UV -LiteDry for Shoes
1:36
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Richard Thornley
2017 May HL paper 2 TZ1 qu 4-8 [IB Chemistry] SOLUTIONS
56:26
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Richard Thornley
2017 May HL paper 2 TZ1 qu 1,2,3 [IB Chemistry] SOLUTIONS
39:18
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Richard Thornley
2017 May HL paper 1 TZ1 [IB Chemistry] ANSWERED/SOLUTIONS/SOLVED
50:10
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Richard Thornley
S2.2.12 Why only 3 Isomers of Dibromobenzene? [HL IB CHEMISTRY]
2:40
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Richard Thornley
2018 May SL paper 1 TZ2 [IB Chemistry] ANSWERED/SOLUTIONS/SOLVED
42:40
Richard Thornley
12 Ali Express science toys for use in the classroom
10:17
Richard Thornley
R1.2.5 Born-Haber Cycle - Calcium Oxide (Gmod)
10:42
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Richard Thornley
2018 May SL paper 1 TZ1 [IB Chemistry] ANSWERED/SOLUTIONS/SOLVED
44:40
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Richard Thornley
2016 May HL paper 2 Qu3,4,5 [IB Chemistry] ANSWERED/SOLUTIONS/SOLVED
41:09
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Richard Thornley
2016 May HL paper 2 Qu 1,2 [IB Chemistry] ANSWERED/SOLUTIONS/SOLVED
45:47
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Richard Thornley
2018 Nov SL paper 2 [IB Chemistry] ANSWERED/SOLUTIONS/SOLVED- worst IB exam in 20 years!
50:25
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Richard Thornley
2016 May HL paper 1 [IB Chemistry] ANSWERED/SOLUTIONS/SOLVED
44:07
Richard Thornley
Lewis Structure: Carbonate ion plus dipoles, shape, angles, resonance and formal charges
7:30
Richard Thornley
Lewis Structure: NITRITE ION NO2- plus dipoles, shape, angles, resonance and formal charges
6:58
Richard Thornley
Lewis Structure: SCN- plus dipoles, shape, angles, resonance and formal charges
6:17