Question

i. Add about 2 mL of cobalt (II) chloride solution, CoCl2(aq), to a clean test tube. Add about 10 drops of the sodium hydroxide solution, NaOH(aq). Observe any changes. j. Place about 2 mL of silver nitrate solution, AgNO3(aq), to a clean test tube. Add about 10 drops of 3M hydrochloric acid, HCl(aq). Observe any changes.

Answer 1

The solution is given below.

i. Reactants CoCl2, NaOH Double displacement reaction Type of Reaction Observations: Formation of orange precipitate Balanced Equation COCI, + NaOH → Co(OH)2 + NaCl i. Reactants AgNO3, HCI Type of Reaction Double displacement reaction Observations: Formation of white precipitate Balanced Equation AgNO3 + HCI → AgCl + HNO;