Question 7
Wear eye protection and disposable gloves when handling solutions. Work under teacher supervision. Investigation 1: an iron nail is placed in about 200 cm³ of copper nitrate solution in a beaker on an electronic balance. The beaker is covered with a watch glass while it stands for a week; the watch glass is removed before the final weighing.
Make a note of any changes that you can see so far. Then take the beaker from the balance, put a watch glass over the top to reduce evaporation and stop dust from falling into it.
Make a note of any changes that you can see so far. Then take the beaker from the balance, put a watch glass over the top to reduce evaporation and stop dust from falling into it.
