Question 5
In this experiment, 10 g of sodium hydrogen carbonate (baking soda) is added to 20 ml of hydrochloric acid in a beaker and stirred gently. Wear safety goggles and disposable gloves; follow the teacher’s instructions for handling the acid. The filtrate is transferred to an evaporating dish and heated gently to evaporate most of the water and leave solid sodium chloride behind. Why is it important to heat the evaporating dish gently during the final step?
