754
487 532

How to do a shapes of molecules question (video tutorial)

15:56

Making a buffer to a certain pH value (mass of sodium ethanoate required)

2:46

Alcohols oxidation and carbonyls reduction exam question

2:15

Predicting whether water at pH 7.0 is neutral at a higher temperature

2:46

Electronegativity and polarity - predicting IMFs

2:43

pH of a strong base from mass of dissolved Group 2 hydroxide

3:14

Group 2 introduction

A quick look at trends in physical and chemical behaviour in group 2. Images used for educational purposes only and remain the property of their original creators.

มุมมอง: 7

วีดีโอ

How to do a shapes of molecules question (video tutorial)

15:56

How to do a shapes of molecules question (video tutorial)

มุมมอง 35วันที่ผ่านมา

A look at how to construct a shapes of molecules answer from scratch, using electron pair repulsion theory. Grab a pen and paper and have a go! (Images used for educational purposes only and remain the property of their original creators)

Making a buffer to a certain pH value (mass of sodium ethanoate required)

2:46

Making a buffer to a certain pH value (mass of sodium ethanoate required)

มุมมอง 13วันที่ผ่านมา

An applied example where you have to first isolate the ethanoate ion concentration and from this, derive the mass of sodium ethanoate required.

Alcohols oxidation and carbonyls reduction exam question

2:15

Alcohols oxidation and carbonyls reduction exam question

มุมมอง 1014 วันที่ผ่านมา

A look at a reaction scheme drawing on two separate A level organic chemistry topics.

Predicting whether water at pH 7.0 is neutral at a higher temperature

2:46

Predicting whether water at pH 7.0 is neutral at a higher temperature

มุมมอง 514 วันที่ผ่านมา

Does water always stay neutral at all temperatures if the pH is maintained at 7.0? Let's take a look!

Electronegativity and polarity - predicting IMFs

2:43

Electronegativity and polarity - predicting IMFs

มุมมอง 1621 วันที่ผ่านมา

A look at how electronegativity differences between bonded atoms, and the orientation of the resulting dipoles across the molecule, enables us to predict likely intermolecular forces. Images used for educational purposes only and remain the property of their original creators.

pH of a strong base from mass of dissolved Group 2 hydroxide

3:14

pH of a strong base from mass of dissolved Group 2 hydroxide

มุมมอง 721 วันที่ผ่านมา

A more applied version starting from mass of dissolved hydroxide, with a 1:2 mole ratio to work out the hydroxide ion concentration.

pH of a mixture of a dibasic acid and strong alkali (NaOH in excess)

2:55

pH of a mixture of a dibasic acid and strong alkali (NaOH in excess)

มุมมอง 1221 วันที่ผ่านมา

A look at a pH of a mixture where the calcuation involves use of Kw. Images used for educational purposes only and remain the property of their original creators.

Applied Kp exam question - Ostwald Process

4:09

Applied Kp exam question - Ostwald Process

มุมมอง 1021 วันที่ผ่านมา

A look at an example with larger partial pressure coefficients so it involves dealing with unusually large numbers!

Selected ionisation energy exam questions

3:51

Selected ionisation energy exam questions

มุมมอง 25หลายเดือนก่อน

A look at a range of aspects of ionisation energy covered by typical A level exam questions.

Applied organic unknowns identification six marker

2:22

Applied organic unknowns identification six marker

มุมมอง 10หลายเดือนก่อน

A look at how to use a range of "clues" in the question to get started, before using deductions to finish the answer off. Images used for educational purposes only and remain the property of their original creators.

3:11

Functional group testing exam question

มุมมอง 22หลายเดือนก่อน

A look at a structured exam question covering several functional groups and what tests identify them.

Water polarity demo using a balloon and tap

0:45

Water polarity demo using a balloon and tap

มุมมอง 44หลายเดือนก่อน

Water polarity demo using a balloon and tap

3:10

Kp worked exam question

มุมมอง 17หลายเดือนก่อน

A look at a typical Kp exam quesiton. Image at the opening slide remains the property of its original creator(s) and is included for educational purposes only.