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• You are required to critically evaluate what was done in the practical. • Procedural errors and measurement errors will need to be identified. • Give workable suggestions on improvements which would minimise the each of the errors suggested and in reducing the maximum percentage error. • Use multiple appropriate reference sources to compare techniques.

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PEARSON • Unit 4 - Scientific Practical Techniques
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Quantitative Analysis 1. Write a report to state and explain what you have done to ensure that the results obtained for Task 1 are as accurate as possible. (M1) Qualitative Analysis 2. State and explain what you have done to ensure that the r...

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UNIT 4 P1

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Quantitative Analysis 1. Sodium hydrogen carbonate can be used to treat acid indigestion and in cooking it is known as baking soda. As an analytical chemist, you are to analyse a sample of sodium hydrogencarbonate for its purity using a method provided (see Additional Guidance). (P1) Qualitative Analysis 2. To do a series of qualitative tests and to write down th...

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PEARSON • Unit 4 - Scientific Practical Techniques
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1. Carry out quantitative analysis on a sample of brass provided by using colorimetry and titration. You are also required to explain the function of each type of equipment and sensor used.

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PEARSON • Unit 4 - Scientific Practical Techniques
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UNIT 4 M3

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Task 2: (M3) • Justify the use of these instruments and sensor. • Give a reason for why each was a suitable choice in terms of accuracy and precision.