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Science Clinic => Chemistry => Topic started by: effaey on Nov 5, 2023

Title: Zinc dissolves in hydrochloric acid to yield hydrogen gas: Zn(s) + 2HCl(aq) ZnCl2(aq) + ...
Post by: effaey on Nov 5, 2023

Question 1

Zinc dissolves in hydrochloric acid to yield hydrogen gas:
         Zn(s) + 2HCl(aq) → ZnCl₂(aq) + H₂(g)
What mass of hydrogen gas is produced when a 7.35 g chunk of zinc dissolves in 500.  mL of 1.200M HCl?
◦ 0.605 g
◦ 0.113 g
◦ 0.302 g
◦ 0.453 g
◦ 0.227 g

Question 2

Zinc dissolves in hydrochloric acid to yield hydrogen gas:
         Zn(s) + 2HCl(aq) → ZnCl₂(aq) + H₂(g)
When a 12.7 g chunk of zinc dissolves in 500. mL of 1.450M HCl, what is the  concentration of hydrogen ions remaining in the final solution?
◦ 0.776 M
◦ 0.388 M
◦ 0.674 M
◦ 1.06 M
◦ 0 M

Title: Zinc dissolves in hydrochloric acid to yield hydrogen gas: Zn(s) + 2HCl(aq) ZnCl2(aq) + ...
Post by: gwisel on Nov 5, 2023

Answer 1

0.227 g

Answer 2

0.674 M