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Acids and Bases (Grade 9)

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Acids and Bases

1. 
Acidic solutions contain high concentrations of
  1. H+ ions
  2. OH- ions
  3. Water
  4. Oxygen
 
2. 
An ionic compound that forms when a metal atom or a positive radical replaces the hydrogen of an acid
  1. soap
  2. salt
  3. disinfectant
  4. all of the above
3. 
pH measures the concentration of OH- in a solution.
  1. True
  2. False
 
4. 
Substances with a pH higher than 7 are                .
  1. acids
  2. bases
  3. neutral
  4. radicals
5. 
Which of the following is an acidic pH?
  1. 7
  2. 3
  3. 9
  4. 12
 
6. 
What is the pH of a strong alkali?
  1. 6
  2. 7
  3. 14
  4. 1
7. 
Which has the most acidic pH?
  1. 2.5
  2. 3.5
  3. 4.5
  4. 5.5
  5. 6.5
 
8. 
What does the symbol HCl mean?



9. 
If my pH indicator turns blue when I add a substance to it, what type of substance do I have?



 
10. 
In a reaction of an acid with a base, the pH changes to a value that is closer to                               .
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