Identifying an Acidic Aqueous Solution
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6 AN AQUEOUS SOLUTION IS ACIDIC IF A. its pH value is high B. it s corrosive C. it changes the colour of litmus D. it has a bitter taste E. it contains more $H_{3}O^{+}$ than $OH^{-}$
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In this problem, we are looking for the condition that defines an aqueous solution as acidic. Let's examine the properties of acids and bases.
Defining Acidic Solutions
Let's look at option A first. This says acidic solutions have a high p H. This is incorrect because acidic solutions actually have a low p H, specifically below seven.
A: pH value is high (Incorrect: Acids have low pH < 7)
What about option B? While many acids are indeed corrosive, some bases are also corrosive. Corrosiveness is a property, but not the defining characteristic that separates all acids from bases.
B: It's corrosive (Not a defining characteristic)
Option C says it changes the color of litmus. Both acids and bases change the color of litmus, but they do so differently. Acids turn blue litmus red. This option is too vague.
C: It changes the color of litmus (Vague - bases do this too)
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