교과서 질문
Classify each of the molecules on the left as an acid, base, or salt. The dissociation products of the molecules are shown to help you.
MgSO4 → Mg2+ + SO42⁻
a. Acid
b. Base
c. Salt
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4. Water
Acids and Bases
객관식
The addition of an acid like HCl to an aqueous solution (pure water) would result in:
a) An increase in pH only.
b) Both the release of H+ and an increase in pH.
c) Both the release of H+ and a decrease in pH.
d) The release of H+ into the solution only.
e) A decrease in pH only.
A
An increase in pH only.
B
Both the release of H+ and an increase in pH.
C
Both the release of H+ and a decrease in pH.
D
The release of H+ into the solution only.
E
A decrease in pH only.
검증된 단계별 안내1
Understand the nature of hydrochloric acid (HCl) as a strong acid, which dissociates completely in water to release hydrogen ions (H⁺).
Recognize that the release of H⁺ ions into the solution increases the concentration of hydrogen ions in the water.
Recall the pH scale, where a lower pH value indicates a higher concentration of H⁺ ions, meaning the solution becomes more acidic.
Consider the effect of increased H⁺ concentration on the pH: as H⁺ concentration increases, the pH decreases.
Conclude that the addition of HCl to pure water results in both the release of H⁺ ions and a decrease in pH, making the solution more acidic.
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