Acids and Bases

Charisma Jenny G. MallariSan Bartolome High School

Write the letter of the correct answer. (5marks)

1. Which of the following is alkaline?

B – hydrogen chlorideC – milk

A – detergent solution

D – vinegar

Correct!Detergent

solution or soapy water has a

pH=12. pH > 7 alkaline

pH = 7 neutral

pH < 7 acidic

2. Using the universal solvent, what will be the observed color if pH=7?

• Excellent! Green will be the observed color when we add the universal solvent to a neutral substance.

3. Using litmus paper on lemon juice, which is a correct observation?

B- Red litmus turns blue

A- No change in blue litmus C- Blue litmus turns red

D- Both litmus papers changed colors

• You got it right!

Remember this

Blue turns Red--- Acid

4. What do you call the reaction between an acid and a base, that produces salt and water?

• A – combustion• B – hydrolysis• C – neutralization• D – solvation

ACID+ BASE H2O + salt

• Superb! In a neutralization reaction, an acid donates its proton H+ to the base to produce H2O and salt.

5. Which of the following will you add to the soil to lower pH?

• A – crushed marble• B – crushed shells• C – lime• D – urea

Excellent!

Urea lowers the pH of the soil. It makes the soil slightly acidic.

End of Quiz

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