1. The clay impurity loses 11% of its weight as moisture on prolonged heating. 5g of chalk on heating shows a loss in weight (due to evolution ofCO2 and water) by 1.1g. A sample of chalk contains clay as impurity. Determine the percentage of chalk in sample.
2. Determine the numbers of milligrams are weighed out to produce the 1 ml of .5% bromo phenol solution?