Chemistry Forum

Can anyone help me with this exercise?

trap the cat

X is HCl solution concentration x mol/l. Y is a solution of Na₂CO₃ concentration y mol/l. Slowly add 100 ml X to 100 ml Y, after the reactions, V₁ liter of CO₂ is obtained. Slowly add 100 ml of Y to 100 ml of X, after the reaction, V₂ liters of CO₂ are obtained. Know the ratio V₁: V₂= 4 : 7. Ratio x : y=?
A)₁₁ : 7.
B)₁₁ : 4.
C)₇ : 5.
D)₇ : 3.

This exercise is nonsense, because it doesn't matter if you add first 100 ml HCl to 100 ml Na₂CO₃ solution or wise versa. The volume of V₁ is everytime equal of Volume of V₂. It can never be different.

The reaction

Na₂CO₃ + 2 HCl => 2 NaCl + H₂O + CO₂