Question

Please help,i really need this!!!
Calcium metal reacts with a potassium chloride solution to form calcium chloride and potassium ions. Balance this reaction.

___Ca(s) + ___KCl(aq) → CaCl2(s) + ___K+(aq)
A) 1, 2, 1, 2
B) 1, 2, 1, 1
C) 1, 1, 1, 1
D) 2, 1, 2, 1

Answer 1

A because KCL 2 and K + CL cancel out and Both of the Ca cancel each other out

Answer 2

Answer: Option (A) is the correct answer.

Explanation:

When calcium reacts with potassium chloride then  it results in the formation of calcium oxide and potassium ions.

The given equation is as follows.

     $Ca(s) + KCl \rightarrow CaCl_{2}(s) + K^{+}$

Number of atoms on reactant side are as follows.

• Ca = 1
• K = 1
• Cl = 1

Number of atoms on product side are as follows.

• Ca = 1
• K = 1
• Cl = 2

To balance the given equation, multiply KCl by 2 on the reactant side and multiply potassium ions by 2 on product side. Therefore, balanced chemical equation will be as follows.

        $Ca(s) + 2KCl \rightarrow CaCl_{2}(s) + 2K^{+}$