The indicator most suitable for this reaction should have a pH equal to?

Na2CO3 + 2HCl → 2NaCl + H2O + CO2

A. 5
B. 7
C. 3
D. 9

Correct Answer: Option C

C. 3

Explanation

Methyl orange is the best indicator for the reaction with range 3.1 – 4.4.