Question

exam lesson name: chemistry
exam number: 700700rr
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question 13 of 20 :
select the best answer for the question.

1. a salt is obtained as a reaction between

○ a. an acid and oxygen.
○ b. a base and water.
○ c. a base and an acid.
○ d. a nonmetal and a metal.

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Explanation:

To determine how a salt is formed, we analyze each option:

• Option A: An acid and oxygen do not react to form a salt. Acids react with bases, metals, etc., but not oxygen in a way to form a salt.
• Option B: A base and water do not form a salt. Bases dissolved in water are alkaline solutions, but no salt formation here.
• Option C: A base (which is a hydroxide or a substance that donates $OH^-$ ions) and an acid (which donates $H^+$ ions) react in a neutralization reaction. The general reaction is $Acid + Base

ightarrow Salt + Water$. For example, $HCl$ (acid) and $NaOH$ (base) react to form $NaCl$ (salt) and $H_2O$.

• Option D: A non - metal and a metal react to form an ionic compound, but this is not the typical way we define the formation of a salt in the context of acid - base chemistry. The reaction between a metal and non - metal is more about forming ionic compounds in general, while the specific formation of a salt (in the context of this question) is best described by the neutralization reaction between an acid and a base.

Answer:

C. a base and an acid.