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Questions and Answers
Which of the following is a strong acid?
Which of the following is a strong acid?
- Calcium carbonate ($CaCO_3$)
- Magnesium oxide ($MgO$)
- Sodium hydroxide ($NaOH$)
- Hydrochloric acid ($HCl$) (correct)
All soluble bases release hydroxide ions when they react with water.
All soluble bases release hydroxide ions when they react with water.
False (B)
What is the chemical formula for sulfuric acid?
What is the chemical formula for sulfuric acid?
H2SO4
A substance that reacts with acids to form _____ is considered a base.
A substance that reacts with acids to form _____ is considered a base.
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Match the following examples with their correct category:
Match the following examples with their correct category:
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Study Notes
Acids
- Acids release hydrogen ions ($H^{+}$) when mixed with water.
- Examples of acids include hydrochloric acid ($HCl$), sulfuric acid ($H_2SO_4$) and nitric acid ($HNO_3$).
Bases
- Bases react with acids to form salts.
- Examples of bases include hydroxides (e.g., sodium hydroxide $NaOH$), oxides (e.g., magnesium oxide $MgO$) and carbonates (e.g., calcium carbonate $CaCO_3$).
Soluble Base
- Ammonia ($NH_3$) is a soluble base but doesn't release hydroxide ions directly.
- It reacts with water to form ammonium ($NH_4^{+}$) and hydroxide ions ($OH^{-}$).
Alkalis
- Alkalis are soluble bases that release hydroxide ions ($OH^{-}$) when mixed with water.
- For example, sodium hydroxide ($NaOH$) is an alkali.
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