Answer:
Option C. 2OH¯ + Ca²⁺ —> Ca(OH)2
Explanation:
OH¯ + Ca²⁺ —> Ca(OH)2
The above equation can be balance as follow:
OH¯ + Ca²⁺ —> Ca(OH)2
There are 2 atoms of OH on the right side and 1 atom on the left side. It can be balance by putting 2 in front of OH¯ as shown below:
2OH¯ + Ca²⁺ —> Ca(OH)2
Next, we shall balanced the charge on both side. This can be obtained as follow:
Total charge on the left side = –2 + 2
Total charge on the left side = 0
Total charge on the right side = 0
Thus, the charge on both side are equal. Hence, the balance ionic equation is:
2OH¯ + Ca²⁺ —> Ca(OH)2
