(A) The reaction of aluminum with hydrochloric acid produces hydrogen gas The balanced chemical equation for the reaction is given below 2 Al(s) 6 HCl(aq) 2 AlCl 3 (aq) 3 H 2 (g) If 35 5 mL of H 2 (g) is collected over water at 26 C and a barometric pressure of 755 mmHg, how many moles of HCl must ...

Problem A To determine the moles of HCl consumed we need to first determine the moles of H2 produced We can use the ideal gas law to do this PV nRT wh ...

(A) The reaction of aluminum with hydrochloric acid produces hydrogen gas. The balanced chemical equation for the...

Question:

(A) The reaction of aluminum with hydrochloric acid produces hydrogen gas. The balanced chemical equation for the reaction is given below.

2 Al(s) + 6 HCl(aq) → 2 AlCl₃(aq) + 3 H₂(g)

If 35.5 mL of H₂(g) is collected over water at 26 °C and a barometric pressure of 755 mmHg, how many moles of HCl must have been consumed? The vapor pressure of water at 26 °C is 25.2 mmHg.

(B) An 8.07 g sample of impure Ag₂O decomposes into solid silver and O₂(g). If 395 mL O₂(g) is collected over water at 25 °C and 749.2 mmHg barometric pressure, then what is the percent by mass of Ag₂O in the sample? The vapor pressure of water at 25 °C is 23.8 mmHg.

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