Question

Mixing sodium bicarbonate and citric acid in a solution produce carbon dioxide that shows as fizz. Given the balanced reaction below, what is the amount in grams of citric acid should be added to 0.5 g sodium bicarbonate to have a complete reaction?

3 NaHCO₃ (aq) + C₆H₈O₇ (aq) ---> 3CO₂ (g) + 3H₂O (l) + Na₃C₆H₅O₇ (aq)

G: 0.5 g NaHCO₃

F: g of C₆H₈O₇

MM: 1 mol NaHCO₃ = 84.01 g NaHCO₃

1 mol C₆H₈O₇ = 192.12 g C₆H₈O₇

MR: 1 mol C₆H₈O₇ = 3 mol NaHCO₃

Answer 1

$n(NaHCO_3)=0.5/84.01=0.00595 mol$

$n (C_6H_8O_7)=n(NaHCO_3)/3=0.00198 mol$

$m(C_6H_8O_7)=0.00198x192.12=0.38 g$