reactions of acid and base

NH₃ + H₂O → NH₄⁺ + OH^-

NH₃ is a

• Acid

• Base

• salt

• water

Which of the following is a neutralization reaction?

• 2Na + Cl₂ → 2NaCl

• CH₄ + 2O₂ → CO₂ + 2H₂O

• HCl + KOH → KCl + H₂O

• CaCO₃ → CO₂ + CaO

Four substances were tested for pH, lemon juice (pH 2), baking soda (pH 9), bleach (pH 12), and milk (pH 6). Which of the following correctly lists the substances from most basic to acidic?

• lemon juice, milk, baking soda, bleach

• bleach, baking soda, milk, lemon juice

• milk, lemon juice, baking soda, bleach

• baking soda, bleach, lemon juice, milk

Predict the products of this reaction.

HCl + Ca(OH)2

• NaCl

• CaCl2

• CaCl2 + H2O

• H2O

Hydrochloric acid (HCl) is known as a strong acid. Which statement describes a strong acid after dissolving in solution?

• few H+ ions: many acid molecules

• many H+ ions; few acid molecules

Which salt is formed in a reaction between HBr and LiOH?

• LiBr

• BrLi

• NaCl

• NaOH

An acid reacts with metal to produce 

• Carbon dioxide 
• Hydrogen gas
• Hydrogen gas and water 
• Salt and hydrogen gas 

A neutralisation reaction produces 

• An acid 
• A neutral substance 
• Only water 
• Salt and water 

An acid reacts with a metal carbonate to produce 

• Salt, water and hydrogen gas
• Salt, water and carbon dioxide
• Limewater
• Salt and water 

What type of reaction is the following: 
HCl  + Zn --> ZnCl₂ + H₂

• Neutralisation
• Acid and a metal 
• Acid and a carbonate 
• Ionic