Acids and Bases Charisma Jenny G. Mallari San Bartolome High School Charisma Jenny G. Mallari San...

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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