How do i calculate the concentration of carbonic acid?I am doing a chemistry experiment investigation that models the formation of acid rain.
The experiment involved producing carbon dioxide and bubbling it through distilled water to produce dilute carbonic acid. To produce the carbon dioxide i reacted sodium carbonate with hydrochloric acid. I have complete the following calculations so far:
2HCl (aq) + Na2CO3 (s) -> 2NaCl (aq) + CO2 (g) + H2O (l)
2H+ (aq) + Na2CO3 (s) -> 2Na+(aq) + CO2(g) + H2O (l)
Initially the number of moles of sodium carbonate and hydrochloric acid must be calculated to determine the limiting reagent:
n (Na2CO3) = ?
M= (22.99 x 2) + 12.01 + (16x3)
= 105.81 g.mol-1
n (HCl)= ?
1mL = 1g
M = 1.008 +35.45
= 1.37144111 mol
The stoichiometric ratio between the hydrochloric acid and sodium carbonate is as follows:
0.08505812305mol x2 of HCl is required to react with Na2CO3
The hydrochloric acid is in excess therefore the sodium carbonate limits the amount of product produced and is the limiting reagent.
Therefore the number of moles of carbon dioxide produced can be calculated as follows:
= n(Na2CO3) (as the stoichiometric ratio is 1:1)
= 0.08505812305 mol
I was wondering waht to do next if i am to calculate the concentration of carbonic acid?