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# Arrhenius Theory of Acids and Bases (Grade 10)

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## Arrhenius Theory of Acids and Bases

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

1.
Which of the following theories defines acid as a species that forms hydronium ion in water?
1. Arrhenius theory
2. Lewis acid-base theory
3. Lowry-Bronsted theory
2.
According to the Arrhenius theory, an acid, when dissolved in water, increases the concentration of which of the following ions?
1. $"H"^+$
2. $"OH"^-$
3. $"Cl"^-$
4. $"H"_2"O"$
3.
According to the Arrhenius theory, a base, when dissolved in water, increases the concentration of which of the following ions?
1. $"H"^+$
2. $"OH"^-$
3. $"H"_3"O"^+$
4. $"H"_2"O"$
4.
Which compound is an Arrhenius acid?
1. $"SO"_2$
2. $"CaO"$
3. $"H"_2"SO"_4$
4. NaOH
5.
Which compound is an Arrhenius base?
1. $"SO"_2$
2. $"HNO"_3$
3. LiOH
4. $"H"_2"O"$
6.
Which of the following substances, when dissolved in water, increases the concentration of hydroxide ions?
1. $"H"_3"PO"_4$
2. NaOH
3. $"H"_2"O"$
4. $"CO"_2$
7.
Which of the following substances, when dissolved in water, increases the concentration of hydrogen ions?
1. $"H"_2"SO"_3$
2. NaOH
3. $"H"_2"O"$
4. $"SO"_2$
8.
Which of the following is NOT produced when magnesium hydroxide is dissolved in water?
1. $"H"^+$
2. $"Mg"^"2+"$
3. $"OH"^-$
4. None of the above
9.
Given the following equation: $"H"_2"O" (l) + "HBr" (g) rarr "H"_3"O"^"+" (aq) + "Br"^"-" (aq)$

Explain why hydrogen bromide in the equation is an Arrhenius acid.

10.
Name the two ions found in sulfuric acid.

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