Summary UNIT 4 P1
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).
2.	To do a series of qualitative tests and to write down their observations. You will also include relevant equations.
3.	You have been provided with an unknown inorganic compound. As an analytical chemist you are carry out qualitative analysis to determine what ions are present.