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 2 years ago
25 cm^3 of 2mol/dm^3 Sodium hydrixude solution and 25cm^3 of 2 mol/dm^3 Sulphuric acid were mixed well to make a solution X. Calculate the concentration of Sulphuric acid in the final solution..
 2 years ago
25 cm^3 of 2mol/dm^3 Sodium hydrixude solution and 25cm^3 of 2 mol/dm^3 Sulphuric acid were mixed well to make a solution X. Calculate the concentration of Sulphuric acid in the final solution..

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Callisto
 2 years ago
Best ResponseYou've already chosen the best response.0Do you mean sodium hydroxide for ''Sodium hydrixude''?

Callisto
 2 years ago
Best ResponseYou've already chosen the best response.0Can you write the chemical equation for the reaction first?

zaphod
 2 years ago
Best ResponseYou've already chosen the best response.02NaOH + H2SO4 > Na2SO4 + 2H20

Callisto
 2 years ago
Best ResponseYou've already chosen the best response.0In this reaction, what is the limiting agent?

zaphod
 2 years ago
Best ResponseYou've already chosen the best response.0limiting agent means? i found the answer it is 1 moldm^3 cn u check it

Callisto
 2 years ago
Best ResponseYou've already chosen the best response.0Hmm, I didn't get the same answer as you.

Callisto
 2 years ago
Best ResponseYou've already chosen the best response.0Perhaps I didn't do it correctly, since I haven't studied chemistry for quite a long time.. No. of mole of H2SO4 used = 1/2 (no. of mole of NaOH) = (1/2) (2x25/1000) = x *NaOH is the limiting agent that will be used up in the reaction. No. of mole of H2SO4 left = no. of mole of H2SO4  no. of mole of H2SO4 used = (2x25/1000)  x = y Concentration of H2SO4 in the final solution = no. of mole of H2SO4 left / volume of the solution. And I take volume of the solution remains unchange, that is 25cm^3 + 25cm^3 = 50cm^3 Did I do anything wrong?

zaphod
 2 years ago
Best ResponseYou've already chosen the best response.0This is how i did, check if im wrong 2NaOH + H2SO4 > Na2So4 +2 H20 the molar ratio is tht, 2 moles of NAOH reacts with 1 mole of H2so4 when u calculate the number of moles in each reactnt it is 0.05 mole, which means 0.05 mol of Naoh react with 0.025 mol of H2so4...so there is 0.025 mole of H2so4 left n = c*v/ 1000 0.025 = c * 25/1000 c = 1 mol dm^3

Callisto
 2 years ago
Best ResponseYou've already chosen the best response.0Why is it 25cm^3 for your volume?

Callisto
 2 years ago
Best ResponseYou've already chosen the best response.0Hmm.. final solution, it's not just the volume of H2SO4, so I prefer using the total volume. But I'm not sure though. As I've said, I haven't studied chemistry for quite a long time!

zaphod
 2 years ago
Best ResponseYou've already chosen the best response.0then the answer becomes 0.5 moldm^3

Callisto
 2 years ago
Best ResponseYou've already chosen the best response.0That's what I got. Sorry for the late reply

Callisto
 2 years ago
Best ResponseYou've already chosen the best response.0The method is right, just the volume is not right/
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