Question

question 2 of 10
what is needed to balance the reaction cl₂ + ki → kcl + i₂?
a. 2cl₂ and 2i₂
b. 2kcl
c. 2ki
d. 2ki and 2kcl

Explanation:

Step1: Count atoms on each side

On the left - hand side: 2 Cl atoms, 1 K atom, 1 I atom. On the right - hand side: 1 K atom, 1 Cl atom, 2 I atoms.

Step2: Balance iodine and potassium

To balance iodine, we need 2 moles of KI on the left - hand side. This also gives 2 moles of K.

Step3: Balance potassium and chlorine on the right

To balance the 2 moles of K and 2 moles of Cl from 2KI on the left, we need 2 moles of KCl on the right. The balanced equation is $Cl_2 + 2KI
ightarrow2KCl + I_2$.

Answer:

D. 2KI and 2KCl