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Two samples of water form two different sources are collected to measure pH value and it was found to be 6.2 and 6.8. How many times the first sample is more acidic than the second sample?
  • a)
    2
  • b)
    4
  • c)
    8
  • d)
    16
Correct answer is option 'B'. Can you explain this answer?
Verified Answer
Two samples of water form two different sources are collected to measu...
Concept:-
pH = -log10 [H+]
-log10 [H+] = pH
[H+] = 10 -pH
Calculation
[H+]I = 10-6.2
[H+]II = 10-6.8

Hence, first sample is 4 times acidic than second sample.
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Most Upvoted Answer
Two samples of water form two different sources are collected to measu...
PH Value and Acidity

Understanding the pH Scale:

The pH scale is a measure of how acidic or basic a substance is. A pH of 7 is considered neutral, while a pH below 7 is considered acidic and a pH above 7 is considered basic. The pH scale ranges from 0 to 14.


Calculating the Acidity Ratio:

To calculate the acidity ratio, we need to use the formula:

Acidity ratio = 10^(pH2 - pH1)

Where pH1 is the pH value of the first sample and pH2 is the pH value of the second sample.


Solution:

Given that the pH values of the two samples are 6.2 and 6.8. To find how many times the first sample is more acidic than the second sample, we need to calculate the acidity ratio using the formula:

Acidity ratio = 10^(6.8 - 6.2)

Acidity ratio = 10^0.6

Acidity ratio = 3.98


Conclusion:

The acidity ratio of the two samples is 3.98, which means that the first sample is approximately 4 times more acidic than the second sample. Therefore, the correct answer is option B) 4.
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