name the water soluble substance witch added with delute hcl and produce gas tarn lime water milky?
The water-soluble substance that, when added to dilute HCl (hydrochloric acid), produces a gas that turns lime water milky is calcium carbonate (CaCO3). The gas produced in this reaction is carbon dioxide (CO2).
If you were wondering how I arrived at this answer, here's the explanation:
1. Start by identifying the gas that is produced when an acid reacts with a carbonate or bicarbonate compound. In this case, the gas is carbon dioxide (CO2).
2. Next, we need to think of a water-soluble substance that contains carbonate ions (CO3^2-) or bicarbonate ions (HCO3^-). Calcium carbonate (CaCO3) is a commonly known substance that is water-soluble and contains carbonate ions.
3. Now, we need to confirm that when calcium carbonate reacts with dilute HCl, a gas is generated. This gas can be tested by bubbling it through lime water (a solution of calcium hydroxide, Ca(OH)2). If the gas is carbon dioxide, it will react with the lime water and turn it milky-white due to the formation of calcium carbonate as a precipitate.
4. As a final step, we can combine the information obtained in the previous steps to determine that calcium carbonate, when added to dilute HCl, produces carbon dioxide gas, and then the gas turns lime water milky due to the formation of calcium carbonate precipitate.