Acids and Bases - Neutralization Reactions

Question 1

Neutralization Reaction

Answer 1

• HBr(aq) + NaOH(aq) -> H2O(l) + NaBr(aq)

- becomes H+(aq) + OH-(aq) -> H2O(l) (reaction produces water)

Question 2

Magnesium hydroxide reacts with hydrochloric acid to yield magnesium chloride and water

Answer 2

• 2HCl(aq) + Mg(OH)2(aq) -> 2H2O(l) + MgCl2(aq)
• balanced reaction gives mole ratios
• 2H+ + 2OH- -> 2H2O

Question 3

titration

Answer 3

• uses one of two reactants with a known concentration to determine concentration of the second
• HBr(aq) + NaOH(aq) -> H2O(l) + NaBr(aq)
• standard NaOH is titrant and is placed in buret. slowly added to HBr. indicator dye turns color as equivalence of base to acid is reached (pH 7). persists and darkens as more base is added

Question 4

note

Answer 4

• if we know molarity and volume of added standard and volume of acid being titrated we can use at equivalence point:
• ca * va = cb * vb