Name: Quiz 5 General Chemistry I Lab 1. Use the experin data in the following ta

Question

Name: Quiz 5 General Chemistry I Lab 1. Use the experin data in the following table to determine the molar concentration of NaOH in this titration gures ast nt all work to get credit for this problem. Report your answer with correct significant figures and units. (4 points) Mass of KHP used Final NaOH buret reading Initial NaOH buret reading 0.623 g 42.35 mL 23.46 mL Use the data in the following table to determine the molar concentration of HCl in this titration experiment. For this problem assume that the NaOH concentration is exactly 0.125 M. 2. You most show all work to get credit for this problem. Report your answer with correct significant figures and units. (4 points) Volume of unknown HCI Final NaOH buret reading Initial NaOH buret reading 50.00 mL 36.89 mL 21.10 mL Predict the products and balance the following neutralization reaction: (2 points) HNO, (aq) + 3. NaOH(aq)

Explanation / Answer

1. The molar mass of KHP is 204.22g/mol. Thus 0.623g of the salt contains 0.623/204.22 = 3.0506mmoles. Since KHP is a monoprotic acid and NaOH is a monobasic base, they both react in a 1:1 ratio implying that that no.of moles of NaOH consumed is also 3.0506mmoles.

The volume of NaOH consumed for this neutralization is 42.35 - 23.46 = 18.89mL. Now that we know that 3.0506mmol of NaOH is contained in 18.89mL, the molarity is calculated as per the formula: Molarity = No.of moles*(1000/Volume) = (3.0506/1000)*(1000/18.89) = 0.16149M.

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