A Level Chemistry

1)      Complete the table comparing how acidic buffers work to basic buffers

2)      Research how to calculate the pH of a buffer solution, then complete the attached questions

3)      Expand your calculating pH mindmap to include calculating the pH of a buffer solution

4)      Complete the buffer solutions activity.

5)      Update your learning logs (I will be checking them next lesson).

Use to reassess hwk

1)      Complete the questions on the method sheet from Thursday ‘s lesson

2)      Complete the questions on the attached biological buffers sheet

3)      Design a mindmap (suggest A3) of the methods to calculate the pH of a strong acid, weak acid, strong base, pure water,  strong acid & strong base, weak acid & strong base, on the reverse include methods of how to calculate concentration from pH.

Research and produce a one page guide on how to use and how to tell purity of samples using melting point analysis (must include at least two methods)

Find the melting points for all reactants and products from the synthesis of Aspirin

Find IR spectra for all reactants and products, on these label the key peaks you will look for in your identification

Please print read and prepare!

Aim: By the end of the lesson you will all titrate at an A level standard!

For those of you who want to get ahead or refresh your GCSE titration calculations I have attached a sheet to support you.

Please print this and then see me to get answers for self-assessment next week

Please print and read this sheet so you are ready to complete the practical on Thursday in G3.

The key difference between A level titrations and GCSE titrations is the level of precision and accuracy that you need to go to; the more familiar you are with each step the better!

1)      Complete the exam questions

2)      Create a mindmap of all of the constants we have come across so far in unit 4.

Due: Wed 9^th October

Use this information to calculate the errors in your experiment, please print and keep in file

All measurement errors need to be converted to %

To help you with the volatile liquid practical:

·         Balance used before 0.005g

·         Balance used after 0.005g

·         Thermometer used 0.5^oC

·         Pressure reading used 10Pa

·         Measuring cylinder used 2ml

For ALL A level chemists,

This link should take you to a series of videos on PV=nRT

to support your independent learning further try exploring this website, it has lectures and worked examples linked to nearly every A level science topic! It is a great helping hand if you are struggling

Share with all the other A level scientists to help them as well