ChemistryName______

Worksheet Package

All About Acids & BasesPeriod ______Date ______

Video – What makes an acid an acid and a base a base?

True or False: Determine whether the following statements are true or false. For

each false statement, changed the underlined word(s) to the correct word(s).

  1. ______Acids and bases are always dangerous to handle.
  2. ______A dilute acid has a small amount of acid dissolved and a larger

amount of water.

  1. ______Milk of Magnesia will turn red litmus paper blue.
  2. ______Lemon juice will turn blue litmus paper pink.
  3. ______If you add sulfuric acid to magnesium metal, gaseous oxygen

is produced plus magnesium sulfate.

  1. ______Phenolphthalein is colorless in a basic solution.
  2. ______Acids feel slippery when placed on the skin.
  3. ______Drain cleaner containing sodium hydroxide is an example of

an acid.

  1. ______Bases contain a metal as part of their formula.
  2. ______HCN would be the formula for a base.
  3. ______The formula for sulfuric acid is HCl.
  4. ______Vinegar contains a base.

Completion: Write in the word(s) which best complete(s) each statement.

  1. Acids taste ______, while bases taste ______.
  2. Acid turn ______litmus paper ______.
  3. Bases turn ______litmus paper ______.
  4. Litmus paper and phenolpthalein are known as ______.
  5. If an iron nail is placed in a solution of sulfuric acid, ______gas is given off.
  6. When an acid reacts with a metal, eating or wearing it away, the process is called ______.
  7. The element which is found in the formula of all acids is ______.
  8. All bases contain ______in their formula.
  9. When acids are placed in water, they give off ______.
  10. When bases are placed in water, they give off ______.
  11. ______is the formula for the hydroxide ion.
  12. The most dangerous test for an acid or base would be ______.

Thought Questions:

  1. List 3 main observable properties of acids.
  1. List 3 main observable properties of bases.
  1. Complete the following chemical equations:

a) HCl + Fe 

b) H2SO4 + Mg 

c) HNO3 + Zn 

d) HCl 

e) HNO3 

f) NaOH 

g) Zn(OH)2 

4)State whether the following solution is acidic or basic:

a) ______grapefruit juice

b)______lime (used on football fields)

c) ______LiOH

d) ______HBr

e) ______sour cream

Video 2 – Neutralization: Acids and Bases Together

True or False: Determine whether the following statements are true or false. For

each false statement, change the underlined word(s) to the correct word(s).

  1. ______If you dip some blue litmus paper into a neutral solution, the

litmus paper turns pink.

  1. ______When sodium hydroxide is mixed with hydrochloric acid, table

salt is formed.

  1. ______HOH is another way of writing a formula for a base.
  2. ______Bases always contain a metal ion and a nonmetal ion.
  3. ______To form a salt, an acid is mixed with a neutral solution.
  4. ______If a base is added to an acid, one drop at a time, the

phenolthalein indicator in the solution will change from

colorless to pink.

  1. ______A neutral solution contains less hydrogen ions than an acidic

solution.

  1. ______A basic solution contains less hydroxide ions than a neutral

solution.

  1. ______NaF is an example of a base.
  2. ______An acid is the chemical opposite of a salt.

Completion: Write in the word(s) which best complete(s) each statement.

  1. A ______solution is neither acidic or basic.
  2. If you mix an acid and a base, you produce ______plus ______.
  3. The reaction is question 2 is called ______.
  4. When an acid and a base are mixed, the water is formed from the ______ion of the acid and the ______ion of the base.
  5. Potassium nitrate can be made by mixing ______acid and ______hydroxide.
  6. Whenever an acid is mixed with a base, the compound which is always produced is ______.
  7. Aluminum hydroxide is an example of a(n) ______.
  8. Aluminum chloride is an example of a(n) ______.
  9. HF is the formula for ______.
  10. If you mix hydrochloric acid and calcium hydroxide, you produce water and a salt called ______.

Thought Questions:

  1. How can you use litmus paper to tell whether a solution is neutral, acidic or basic?
  1. Complete each of the following chemical equations:

a) HCl + NaOH 

b) H2SO4 + Mg(OH)2

c) HNO3 + KOH 

d) HCl + Al(OH)3 

e) H+ + OH-

Video 3 – pH: Acid or Base

True or False: Determine whether the following statements are true or false. For

each false statement, change the underlined word(s) to the correct word(s).

  1. ______A strong acid gives off many hydroxide ions in water.
  2. ______The pH of a solution is found to be 5.5. This means the

solution is basic.

  1. ______A pH of 10 is more basic than a pH of 8.
  2. ______Club soda is shown to have a pH of about 4, so club soda is an

acidic solution.

  1. ______The pH of a dilute solution of calcium hydroxide would be

greater than 7.

  1. ______The pH of a vinegar solution would be greater than 7.
  2. ______A low pH tells you that few hydrogen ions are present.
  3. ______As a solution becomes more basic, its pH decreases.
  4. ______Air pollution from industry often causes rainwater to become

acidic.

  1. ______Unpolluted rainwater is slightly acidic.

Completion: Write in the word(s) which best complete(s) each statement.

  1. You can think of pH as the ______of hydrogen ions.
  2. A solution with a pH of 6 is a (strong, weak) ______acid.
  3. Methyl violet, which changes the color at different pH’s is known as a(n) ______.
  4. The pH of pure water should be ______.
  5. An electrical device which can measure the pH is called a ______.
  6. A ______gives off many hydroxide ions in water.
  7. If you mix equal amounts of sodium hydroxide with hydrochloric acid, the pH will be ______.
  8. If vinegar is added to a potassium hydroxide solution, the pH ______.
  9. The pH of your blood should be between ______and ______.
  10. The pH of a sample of polluted rainwater is found to be 2. This means the rain is ______.

Thought Questions:

  1. Tell the difference between a strong acid and a weak acid.
  1. Tell the difference between a strong base and weak base.
  1. What causes rainwater to become acidic?
  1. Name two items in your home that have a pH less than 7.
  1. Name two items in your home that have a pH greater than 7.
  1. For each of the following substances, which property doesn’t fit? Why?

Substance A Substance B Substance C

Tastes bitter. Turns red litmus Turns red litmus

Turns blue litmus blue. blue

pink. Has a pH of 9.5. Feels slippery.

Has a pH of 5.8. Reacts with metals Has a pH of 4.0.

giving off hydrogen

gas.