Which of the following do you need to know to be able to calculate the molarity

Question

Which of the following do you need to know to be able to calculate the molarity of a salt solution? The molar mass of the salt added The molar mass of the salt. The volume of water added The total volume of the solution I, III, I, II, III II, III I, II, III II, III I, II, IV You need all of the information. You have separate solution of HC1 and H2S04 with the same concentration in terms of molarity. You wish to neutralize a solution of NaOH. Which acid solution would require more volume (in mL) to neutralize the base? The HC1 solution The H2S04 solution You need to know the acid concentration to answer this question You need to know the volume and concentration of the NaOH solution to answer this question c and d When 10.0 mol of V2O5 are mixed with 10.0 mol of Ca, which is the limiting reactant according to the following reaction?

Explanation / Answer

for q. no. 10 correct choice is (d) here's why molarity = (moles of salt)/(total vol. of solution in liters) to get this you need no. of moles of solute and total vol. of soln only to get no. moles of solute you need amt. of salt added (item I) and molar mass of the salt(item II) and the info abt vol of soln is in item IV hence I,II and IV are reqd ... so option (d) for question (11) the neutralization rxn is rxn of H+ ions with OH- ions to form water in both cases the base is NaOH which can provide only one OH- ion now for a constant amt oh NaOH titrated with both HCl and H2SO4 separately you will need half the amt of H2SO4 since H2SO4 can provide 2 H+ ions compared to one that can be provided by HCl so the amt of H2SO4 that you will need only half the amt of HCl that has been used hence (a) is the correct choice

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