Question

Which two reactants make Calcium carbonate?

Answer 1

Impossible to form from given reactants

Explanation:

Only sodium has carbonate ion here .so only possible way to displace carbonate is to use potassium

When sodium carbonate and Potassium iodide react with each other double displacement reaction occurs

As potassium is powerful than sodium it displaces sodium to form potassium carbonate .

Then you have to use water and then you can use calcium suppliment .

Answer 2

Answer:

• Calcium chloride
• Sodium carbonate

Explanation:

The reaction :

CaCl₂ + Na₂CO₃ ⇒ CaCO₃ + 2NaCl

This is clearly an example of a displacement reaction, where sodium displaces calcium in calcium chloride to form sodium chloride, and we are left with calcium carbonate.