Question

PlZZZ HELP! I’ll thank u!

Answer 1

The answer to your question is: 12 ml of HCl

Step-by-step explanation:

Data

Na2CO3 V = 30 ml [ ] = 0.1 mol/l

HCl = 0.5 mol /L V = ?

Balance reaction

Na₂CO₃ + 2HCl ⇒ 2NaCl + CO₂ + H₂O

Process

1.- Find the number of moles of Na2CO3

Molarity = n / V

n = VM n = (30)(0.1) = 3 moles

2.- From the reaction

1 mol of Na2CO3 --------------- 2 HCl

3 mol ------------------------------- x

x = (3 x 2) / 1

x = 6 moles of HCl

3.- Volume of HCl

V = n / M V = 6 / 0.5

V = 12 ml