Develop a procedure to safely combine each pair of materials listed
below. Use five drops of each solution. In your procedure, consider
how much of each solid you will need given this constraint.

1. water and crushed chalk
2. vinegar and crushed chalk
3.silver nitrate solution and sodium hydroxide solution
4.silver nitrate solution and sodium iodide solution
5. lead nitrate solution and sodium iodide solution
6.sodium hydroxide solution and sodium iodide solution