Describe a simple laboratory experiment to distinguish between calcium hydrogen carbonate and sodium hydrogen carbonate

react each with a dilute strong acid, such as sulfuric acid

the NaHCO3 will leave a clear solution (sodium ) after bubbling
NaHCO3 + H2SO4(aq)>>> CO2 (g) + H20 + Na2SO4 (in solution)
Calclum will leave a NOT clear liquid (Calcium)
Ca(HCO3)2 + H2SO4(aq)>>> CO2 (g) + H20 + CaSO4 (precipate)

Thank you very much

Tyyyy😌😊

In separate test tubes boil about 5cm3 of each solution. Sodium hydrogen carbonate solution remains colorless and forms no precipitate. Calcium hydrogen carbonate solution changes from colorless to a white precipitate.

To distinguish between calcium hydrogen carbonate and sodium hydrogen carbonate, you can perform a simple laboratory experiment. Here's a step-by-step explanation of how to conduct the experiment:

Materials Needed:
- Calcium hydrogen carbonate (Ca(HCO3)2)
- Sodium hydrogen carbonate (NaHCO3)
- Distilled water
- Two test tubes
- Dilute hydrochloric acid (HCl)
- pH paper or universal indicator

Procedure:

1. Label two test tubes as 'A' and 'B' to keep track of the samples.

2. In test tube 'A,' add a small amount of calcium hydrogen carbonate.

3. In test tube 'B,' add a small amount of sodium hydrogen carbonate.

4. Add a few milliliters of distilled water to each test tube. Swirl gently to dissolve the compounds.

5. To test for the presence of carbonates, add a few drops of dilute hydrochloric acid to each test tube.

- If bubbling or effervescence occurs in test tube 'A,' it indicates the presence of calcium hydrogen carbonate. This is because calcium hydrogen carbonate reacts with acid to produce carbon dioxide gas (CO2), water (H2O), and calcium chloride (CaCl2). The bubbles or effervescence is the result of the released carbon dioxide gas.

- If bubbling or effervescence occurs in test tube 'B,' it indicates the presence of sodium hydrogen carbonate. This is because sodium hydrogen carbonate also reacts with acid to produce carbon dioxide gas (CO2), water (H2O), and sodium chloride (NaCl). The bubbles or effervescence is the result of the released carbon dioxide gas.

6. After the bubbling stops, test the pH of the remaining solutions in both test tubes using pH paper or universal indicator.

- If the pH of the solution in test tube 'A' is acidic (pH<7), it indicates the formation of calcium chloride, which is acidic. This result confirms the presence of calcium hydrogen carbonate.

- If the pH of the solution in test tube 'B' remains basic or slightly alkaline (pH>7), it indicates the formation of sodium chloride, which is neutral. This result confirms the presence of sodium hydrogen carbonate.

By following these steps, you can distinguish between calcium hydrogen carbonate and sodium hydrogen carbonate based on their reactions with acid and the resulting pH of the solutions.