Chapter 02 Acids, Bases and Salts Questions-04
QUESTIONS
1. You have two solutions, A and B. The pH of solution A is 6 and $pH$ of solution B is 8 . Which solution has more hydrogen ion concentration? Which of this is acidic and which one is basic?
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Answer
A pH value of less than 7 indicates an acidic solution, while greater than 7 indicates a basic solution. Therefore, the solution with $pH=6$ is acidic and has more hydrogen ion concentration than the solution of $pH=8$ which is basic.
2. What effect does the concentration of $H^{+}(aq)$ ions have on the nature of the solution?
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Answer
Concentration of $H _{(\alpha q)}^{+}$can have a varied effect on the nature of the solution. With an increase in $H+$ ion concentration, the solution becomes more acidic, while a decrease of $H+$ ion causes an increase in the basicity of the solution.
3. Do basic solutions also have $H^{+}(aq)$ ions? If yes, then why are these basic?
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Answer
Yes, basic solution also has $H _{(a q)}^{+} \quad$ ions. However, their concentration is less as compared to the concentration of $OH^{-}$ions that makes the solution basic.
4. Under what soil condition do you think a farmer would treat the soil of his fields with quick lime (calcium oxide) or slaked lime (calcium hydroxide) or chalk (calcium carbonate)?
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Answer
If the soil is acidic and improper for cultivation, then to increase the basicity of soil, the farmer would treat the soil with quick lime or slaked lime or chalk.
