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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