Question

Which is a balanced equation for this reaction?
A. KOH + H3PO4?K3PO4 + H2O
B. 3KOH + H3PO4 ?K3PO4 + 3H2O
C. KOH + 2H3PO4?K3PO4 + 3H2O
D. 3KOH + 2H3PO4?K3PO4 + 3H2O

Answer 1

Solution:

Option B is correct.

Explanation:

Given  balanced reaction is:

$3KOH + H_{3} PO_{4} --- > K_{3} PO_{4} + 3H_{2} O$

Answer 2

Option (D) is balanced chemical equation.

Which is a balanced chemical equation ?

A. KOH + H₃PO₄ ⇒K₃PO₄ + H₂O

B. 3KOH + H₃PO₄ ⇒K₃PO₄ + 3H₂O

C. KOH + 2H₃PO₄ ⇒K₃PO₄ + 3H₂O

D. 3KOH + 2H₃PO₄ ⇒2K₃PO₄ + 3H₂O

solution :

Law of conservation of mass : it says “ a chemical equation must be balanced. which means mass of reactant must be equal of that of product. because mass is neither created nor destroyed,.”

now you understand why we balance chemical equation. let's balance the equation.

• It is very easy to solve. just count number of each element on reactants and products.
• If number of each element is same in reactants and products then we say, it is balanced otherwise it is imbalanced.

here option (D) is balanced.

∵ number of K in reactants = 3 = number of K in products

number of O in reactants = 11 = number of reactants in products

number of H in reactants = 9 = number of H in products

number of P in reactants = 2 = number of P in products.

Therefore option (D) is balanced chemical equation.