General Chemistry I Lecture Notes Summary

These flashcards summarize key concepts and calculations from the General Chemistry I lecture on chemical reactions and stoichiometry.

What are the reactants in the reaction of NaOH with AlCl3?

NaOH and AlCl3 are the reactants.

What is the balanced chemical equation for the reaction between NaOH and AlCl3?

3NaOH + AlCl3 -> Al(OH)3 + 3NaCl

What precipitate forms when NaOH is mixed with AlCl3?

Al(OH)3 (aluminum hydroxide) is the precipitate that forms.

How do you determine the limiting reactant in a chemical reaction?

The limiting reactant is the substance that is completely consumed first, limiting the amount of product formed.

What is the mass of the precipitate Al(OH)3 produced from the reaction?

0.819 g of Al(OH)3 is produced.

Calculate the concentration of OH ions remaining in solution after the reaction.

0.18 M concentration of OH ions remains.

What is the percentage by mass of magnesium hydroxide in the sample after dissolving in HCl?

91.42% of the sample is magnesium hydroxide.

What is the balanced equation for the reaction of magnesium hydroxide with HCl?

Mg(OH)2 (s) + 2HCl(aq) -> MgCl2(aq) + 2H2O.

How can silver ions be precipitated from a silver nitrate solution?

By adding HCl(aq) to the solution to form AgCl(s).

What volume of 0.150M HCl is needed to precipitate silver ions from 15.0 mL of 0.200M AgNO3?

0.0750 L or 75.0 mL of HCl is needed.

What mass of KCl is needed to precipitate the silver ions from 15.0 mL of 0.200M AgNO3?

0.224 g of KCl is required to precipitate the silver ions.

Which analysis procedure is more cost-effective for precipitating AgCl: using HCl or KCl?

Using KCl is more cost-effective.