Question

Rank these substances in increaing acididty (least to most)

1.0M HCOOH

1.0M NaHCO₃

1.0 M H₂SO₄

Which of these pairs represent the products of this dissociation in water?

Mg(OH)₂=______+______

a. MgOH, H₂

b.OH-, MgOH⁺

c. Mg⁺², 2OH-

d. Mg⁺, 2OH-

e. OH₂-, Mg⁺

Which of these equations best repsesents the reaciton that takes place in the stomach when the antacid calsium carbonate is taken?

a. NaHCO₃+H₂O+CO

b. CaCO₃=H₂O+CO

c. CO₃^2-+2H₃O⁺=3H₂O+CO₂

d. Ca²⁺+2H₃O⁺=3H₂O+CaO

e. CaCO₃+H₃O⁺=Ca(OH)₂+CO₂

Which os these gases combine with water to form acid rain?

SO₂ , NO₂ H₂, N_2, Cl₂

Answer 1

Rank these substances in increaing acididty (least to most)

Answer:   1.0M NaHCO₃ < 1.0M HCOOH < 1.0 M H₂SO₄

NaHCO3 is a base, formic acid is a weak acid, sulfuric acid is a strong acid.

Which of these pairs represent the products of this dissociation in water?

Answer:   Mg(OH)₂=___Mg⁺²___+___2OH-___

it dissociates into two seperate ions cation & anion

Which of these equations best repsesents the reaciton that takes place in the stomach when the antacid calsium carbonate is taken?

Answer:      c. CO₃^2-+2H₃O⁺=3H₂O+CO₂

most of the carbonates reacts with acid and forms carbon dioxide and water

Which os these gases combine with water to form acid rain?

Answer:     SO₂ , NO₂ &Cl₂

SO₂ + H₂O --> H₂SO₃

3 NO₂ + H₂O = 2 HNO₃ + NO

Cl₂ +H₂O --> HClO +HCl