【Daily Question】9.19 Reply +2； To +3
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This post was last edited by zjp on 2015-9-20 at 14:37. In order to increase the popularity of the chemical analysis section, the previous 【Weekly Topic】 activity has been replaced with a 【Daily Question】 activity; this aims to foster active technical exchanges while also providing members with certain financial rewards. 【Daily Question】 (Single-choice question) A change of one unit in the pH value of a solution corresponds to a change of ( ) times in the concentration of hydrogen ions in that solution. (A) 10 ； (B) 5 ； (C)1 ； (D) 0.1. Standard answer: (A) 10. Reply with your answer in the comments; you will receive +2 wealth points for participating in the quiz. An additional +3 to +8 wealth points will be given if you answer all questions correctly. Extra wealth rewards will be awarded if you provide a thorough analysis and explanation of the questions or answers, including detailed calculation processes. If your answer is correct and your analysis is accurate, it will be marked as the best reply (or the best assistance). Feel free to answer the questions. Note: We will close this post after 24 hours, and at that time we will announce the best reply (the best assistance), as well as the answer and explanation.
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The answer is A; there is a factor of 10 difference per unit of meter, which is calculated using logarithms.
For every one-unit change in the pH value of a solution, it corresponds to a change in the hydrogen ion concentration by (A) times
A change of one unit in the pH value of a solution corresponds to a change of (10) times in the hydrogen ion concentration in that solution.
A change of one unit in the pH value of a solution corresponds to a change of (10) times in the hydrogen ion concentration in that solution.
For every one-unit change in the pH value of a solution, it corresponds to a change in the hydrogen ion concentration by (A) times. (A) 10 ； (B) 5 ； (C)1 ； (D) 0.1.
A difference of one unit in the pH value of a solution corresponds to a tenfold difference in the hydrogen ion concentration in that solution. (A) 10 ； (B) 5 ； (C)1 ； (D) 0.1
【Daily Question】 (Single-choice question) A difference of one unit in the pH value of a solution corresponds to a difference of (A) times in the hydrogen ion concentration in that solution. (A) 10 ； (B) 5 ； (C)1 ； (D) 0.1.
A difference of one unit in the pH value of a solution corresponds to a factor of ( ) difference in the hydrogen ion concentration in that solution. (A) 10 ；