**Category:** Inorganic Chemistry  
**Subtype:** Chemical Reactions  
**Problem Description:** This problem involves a series of laboratory steps to observe chemical reactions and identify the properties of substances involved. It requires analyzing the outcomes of each step and determining the validity of several statements based on the results of the experiment.

1. **Step 1:** Mixing \(\mathrm{CuSO}_{4}\) and \(\mathrm{NaOH}\) to form a precipitate, then adding \(\mathrm{NH}_{3}\) to another solution containing \(\mathrm{AgNO}_{3}\).
2. **Step 2:** Adding dilute \(\mathrm{H}_{2} \mathrm{SO}_{4}\) to a solution of sucrose and heating it.
3. **Step 3:** Adding \(\mathrm{NaHCO}_{3}\) to the heated solution to remove \(\mathrm{CO}_{2}\) gas, then dividing the solution.
4. **Step 4:** Mixing solutions from previous steps to observe color changes and precipitate formation.

**Objective:** Determine how many of the provided statements about the experiment are correct, focusing on the properties of the solutions and the reactions that occurred.