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Ninth Grade (Grade 9) Acids and Bases Questions

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Grade 9 Acids and Bases
Grade 9 Acids and Bases
What is the scale called that measures the strength of acids and bases?
  1. pH scale
  2. Acidity scale
  3. Corrosive scale
  4. Hydrogen scale
Grade 9 Acids and Bases
Which of these is a proton donor?
  1. A buffer
  2. A base
  3. A water molecule
  4. An acid
Grade 9 Acids and Bases
Grade 9 Acids and Bases
A strong base is characterized by which of the following?
  1. A high concentration of hydrogen ions
  2. A high concentration of hydroxide ions
  3. A high pH
  4. A low pH
  5. Both b and c
  6. Both a and d
Grade 9 Acids and Bases
The pH scale is used to measure                       .
  1. How acidic a liquid is
  2. How basic a liquid is
  3. Both (a) and (b)
  4. None of the above
Grade 9 Acids and Bases
Acidic solutions contain high concentrations of which of the following?
  1. electrons
  2. hydrogen ions
  3. hydroxide ions
  4. water
  5. oxygen
Grade 9 Acids and Bases
If a substance is considered to be a base, that means it has which of the following set of properties?
  1. low concentration of H+ ions, has a pH value of 1 to 6
  2. low concentration of OH- ions, has a pH value of 1 to 6
  3. high concentration of H+ ions, has a pH value of 8 to 14
  4. high concentration of OH- ions, has a pH value of 8 to 14
Grade 9 Acids and Bases
What is the pH of pure water?
  1. pH=0
  2. pH=14
  3. pH=7
  4. pH=5
Grade 9 Acids and Bases
Acidic solutions contain high concentrations of which of the following?
  1. [math]H^+[/math] ions
  2. [math]OH^-[/math] ions
  3. Water
  4. Oxygen
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