neer necessary.) e, answers should be given to the correct mum number of signifi
ID: 552565 • Letter: N
Question
neer necessary.) e, answers should be given to the correct mum number of significant digis 1. Answer the following questions: By titration, 17.6 mL of aqueous H SO, neutralized 27.4 mL of 0 ofo.0165 M LioH solution. You will need to find the molarity of the aqueous acid solution. Summarize the steps necessary to determine the answer to the question from the given a. b. What is the balanced neutralization equation for the reaction? c. What is the mole ratio of H2SO4 and LiOH? d. What was the volume of known solution used? e. What was the amount (in mol) of known solution used? What was the amount (in mol) of unknown solution used? What was the volume of unknown solution used? What was the molarity of the unknown solution? f. g. h.Explanation / Answer
Ans
a) In the titration reactions , the number of moles of known solution is detrmined and then it is compared with the unknown solution . This way the volume and concentration of unknown solution can be determined.
b) The balanced neutralisation reaction is given as :
H2SO4 + 2LiOH = Li2SO4 + 2H2O
c) The mole ratio of H2SO4 : LiOH is 1:2
d) The volume of known solution is 27.4 mL
e) The amount of known solution will be = 0.0274 x 0.0165 = 0.0004521 moles
f) The amount of unknown solution will be = 0.0004521 / 2 = 0.00022605 moles
g) The volume of unknown solution is 17.6 mL
h) The molarity of unknown solution will be = 0.00022605 / 0.0176
M = 0.0128 M
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