Author Question: A 3.00-g sample of an alloy (containing only Pb and Sn) was dissolved in nitric acid (HNO3). ... (Read 95 times)

ENagel · **on:** Mar 21, 2021

Question 1

A 25.00-mL sample of H₂SO₄ is titrated with 0.2453 M NaOH. The titration requires 32.47 mL of NaOH solution to neutralize the H₂SO₄. What is the molarity of the H₂SO₄?

◦ 0.3186 M
◦ 0.1889 M
◦ 0.3777 M
◦ 3.309 M
◦ 0.1593 M

Question 2

A 3.00-g sample of an alloy (containing only Pb and Sn) was dissolved in nitric acid (HNO₃). Sulfuric acid was added to this solution, which precipitated 2.90 g of PbSO₄. Assuming that all of the lead was precipitated, what is the percentage of Sn in the sample? (molar mass of PbSO₄ = 303.3 g/mol)

◦ 34.0% Sn
◦ 0.956% Sn
◦ 96.7% Sn
◦ 66.0% Sn
◦ 1.98% Sn

l.stuut · **Reply #1 on:** Mar 21, 2021

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