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# Bronsted-Lowry Theory of Acids and Bases (Grade 10)

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## Bronsted-Lowry Theory of Acids and Bases

Instructions: Answer the following questions, based on your knowledge of Bronsted-Lowry acids and bases.

1.
What is HCl, if it donates a proton to water?
1. A Bronsted-Lowry acid
2. A Bronsted-Lowry base
3. Water
4. An amphiprotic substance
2.
Which of the following refers to a substance that accepts a proton?
1. A Bronsted-Lowry acid
2. Water
3. A Bronsted-Lowry base
4. An Arrhenius base
3.
Based on the reaction shown: $"HNO"_3 + "NH"_3 rarr "NO"_3^"-" + "NH"_4^"+"$,

Which of the following represents the Bronsted-Lowry base?
1. $"HNO"_3$
2. $"NH"_3$
3. $"NO"_3^"-"$
4. $"NH"_4^"+"$
4.
Based on the reaction shown: $"HNO"_3 + "NH"_3 rarr "NO"_3^"-" + "NH"_4^"+"$,

Which of the following represents the Bronsted-Lowry acid and its conjugate base?
1. $"HNO"_3"/""NH"_4^"+"$
2. $"NH"_3"/""NH"_4^"+"$
3. $"HNO"_3"/""NO"_3^"-"$
4. $"NH"_3"/""NO"_3^"-"$
5.
Based on the reaction shown: $"H"_2"SO"_4 + "H"_2"O" rarr "HSO"_4^"-" + "H"_3"O"^"+"$,

Which of the following represents the Bronsted-Lowry acid?
1. $"H"_2"SO"_4$
2. $"H"_2"O"$
3. $"HSO"_4^"-"$
4. $"H"_3"O"^"+"$
6.
Based on the reaction shown: $"H"_2"SO"_4 + "H"_2"O" rarr "HSO"_4^"-" + "H"_3"O"^"+"$,

Which of the following represents the Bronsted-Lowry base and its conjugate acid?
1. $"H"_2"SO"_4"/""HSO"_4^"-"$
2. $"H"_2"O""/""HSO"_4^"-"$
3. $"H"_2"SO"_4"/""H"_3"O"^"+"$
4. $"H"_2"O""/""H"_3"O"^"+"$
7.
A substance that is capable of donating or accepting a proton is called what?
1. A Bronsted-Lowry acid
2. A Bronsted-Lowry base
3. An amphoteric substance
4. None of the above
8.
If $"HSO"_4^"-"$ acts as a Bronsted-Lowry acid, what would be its conjugate base?
1. $"H"_3"SO"_4^"+"$
2. $"H"_2"SO"_4$
3. $"SO"_4^"2-"$
4. $"H"_2"O"$
9.
Given the following equation: $"H"_3"PO"_4 (aq) + "H"_2"O" (l) hArr X (aq) + "H"_3"O"^"+" (aq)$

What ion is represented by X?

10.
Given the following equation: $"HClO"_"4" (aq) + "H"_2"O"(l) hArr "ClO"_"4"^"-" (aq) + "H"_3"O"^"+" (aq)$,

Explain why $"HClO"_4(aq)$ represents a Bronsted acid in this equation.

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