The Relative Formula Mass of an Unknown Acid Essay

1463 Words 6 Pages
The Relative Formula Mass of an Unknown Acid

Table of contents

1.1 Aim of the experiment 2

1.2 Introduction 2 1.3 Equipments and apparatus 2

1.4 Safety precautions 2

2.1 Procedure 3

2.2 Apparatus setup 3

2.3 Analysis 4

3.1 Implementing
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There are two types of acids called organic acids and mineral acids. Organic acids, such as methanoic acid, citric acid or latic acid, are obtained from plant and animal sources. From the other side, mineral acids (hydrochloric acid, nitric acid or sulphuric acid) are made from minerals. They are much more reactive with bases than organic acids.

1.3 Equipments and apparatus

1. burette

2. 25 cm3 pipette

3. pipette filler

4. stand and clamp

5. funnel

6. 500 cm3 beaker

7. 250 cm3 conical flask

8. phenolphthalein indicator

9. wash bottle/deionised water

10. 250 cm3 of the unknown acid solution

11. 250 cm3 of 0.100 M sodium hydroxide solution

12. A sheet of paper to record the results of the titration

13. A white tile

1.4 Safety precautions

You must be careful throughout preparing the solution and the titration process. Some chemicals can pose a risk. In this case an alkali (sodium hydroxide) is corrosive chemical. In contact with skin it will cause burn and damage eyes. From the label of the unknown acid you can deduce that it is a toxic substance which is poisonous and can kill you. The care must be also taken while using phenolphthalein indicator. Its pH value is 9.5 which mean it is an alkali. This chemical also may cause damage to your body. During