Unfamiliar things in chemistry/ things that I get confused on

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Chemistry

A-Level Chemistry

AQA

formulas

unfamiliar questions

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1
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What is the chemical formula for sodium sulphate ?

Na2SO4

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Nitrate

NO3-

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How to calculate concentration using mass and volume?

If you are given the mass, you can do mass/mr and then you get moles. Do moles over volume to get your answer.

<p>If you are given the mass, you can do mass/mr and then you get moles. Do moles over volume to get your answer. </p>
4
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A student rinsed the apparatus before starting an acid-base titration.

The results of the titration showed that the volume of acid added from the burette was larger than expected.

Which is a possible reason for this?

The burette was rinsed only with water.

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What is the scientific name for vinegar?

Acetic acid.

6
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Purpose of aspirin.

Medications.

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What is the conversion of miligram to grams?

Mg x 10^-3 = g

8
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What is the formula for hydrogen peroxide?

H2O2

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TLC absorption of amino aicds

The more the amino aicds are able to absorp the more likely they are to be at the bottom of the TLC paper.