# Generating Chlorine from Ca(OCl)2 and HCl: 50.0g & 275 mL

• sahen
In summary, when 50.0g of Ca(OCl)2 and 275mL of 6.00M HCl are allowed to react, 0.35 moles of Ca(OCl)2 and 1.4 moles of HCl will be present. HCl will be in excess with a mass of approximately 16.8 grams.

#### sahen

Chlorine can be generated by heating together calcium hyperchlorite and hydrochloric acid. Calcium chloride and water are also formed.

a) If 50.0g of Ca(OCl)2 and 275mL of 6.00M HCL are allowed to react, how many grams of chlorine gas will form?

b) Which reactant will be in excess and what is its mass?

The attempt at a solution

Ca(ClO)2 + 4 HCl → CaCl2 + 2 H2O + 2 Cl2 is this a redox equation ? i don't know how to proceed. Any help would be would be appreciated ...

Yes, this is redox - buit it doesn't matter. It is a (relatively) simple limiting reagent problem.

You have a correct reaction equation, calculate how many moles of both reactants you have. Which one is in excess?

i guess Ca(OCl)2 0.35 moles and 1.4 moles hcl is this right ?

Nothing to guess here, just calculate. One of your numbers is wrong.

## 1. How much chlorine can be generated from 50.0g of Ca(OCl)2?

The theoretical yield of chlorine from 50.0g of Ca(OCl)2 is 14.57g, assuming complete conversion of the reactant.

## 2. What is the molarity of the HCl solution needed to generate chlorine from 50.0g of Ca(OCl)2?

The molarity of the HCl solution needed can be calculated using the formula M1V1 = M2V2, where M1 is the molarity of the Ca(OCl)2 solution (unknown), V1 is the volume of the Ca(OCl)2 solution (275 mL), M2 is the desired molarity (unknown), and V2 is the volume of HCl needed to react with the Ca(OCl)2 (unknown). Solving for M2, we get a molarity of 0.2 M HCl solution.

## 3. How much HCl is needed to react with 50.0g of Ca(OCl)2?

Using the equation M1V1 = M2V2 (as mentioned in question 2), we can solve for V2 (volume of HCl needed). Plugging in the values, we get V2 = 13.75 mL of 0.2 M HCl solution.

## 4. What is the balanced chemical equation for the reaction between Ca(OCl)2 and HCl to generate chlorine?

Ca(OCl)2 + 2HCl → Cl2 + CaCl2 + H2O

## 5. What are the safety precautions when generating chlorine from Ca(OCl)2 and HCl?

1. Wear appropriate personal protective equipment, such as gloves and goggles, to avoid contact with the chemicals.
2. Perform the experiment in a well-ventilated area to avoid inhalation of toxic gases.
3. Handle the chemicals with care to avoid spills or splashes.
4. Do not mix the chemicals with other substances.
5. Dispose of the leftover chemicals properly according to safety regulations.