please help with these questions! The ph Scale and -logarithms The pH scale is a

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please help with these questions!

The ph Scale and -logarithms The pH scale is a numerical scale from 0-14 that represents the hydrogen ion concentration of a solution. Solutions with a pH of O have the highest hydrogen ion concentration, and solutions with a pH of 1-4 have the lowest hydrogen ion concentration. This is because the p?H isn't the acrual hydrogen ion concentration; instead, it is a negative logarithm of a solution's hydrogen ion concentration. This actualy isn't as difficult as it sounds. Grab your calculator and enter the following: -logi0.01) -logi0.001) log:0.0001) -log(0.00001) Notice the general trend here: As the number gets smaller, its negative log gets biccer Here's a quick example using hydrogen ions: Solution X has a hydrogen ion concentration of 0.05 AM. Solution Y has I Which solution has more hydrogen ions? (Hont: It's just the solution with the bigger numbee.) 1 What is the-log of solution X? 1 What is the-log of solution Y? a hydrogen ion concentration of 0.0002 M. As you can see, the solution with the higher hydroagen ion concentration has the lowver -log. This means that: t Solution X is the more acidio basic) solution and has a lowerhigher) pH. lower higher) pH. 1 Solution Y is the more (acidic basic) solution and has a Chemisty UNIT2 1 33

Explanation / Answer

-log(0.01)=pH2

-log(0.001)=pH3

-log(0.0001)=pH4

-log(0.00001)=pH5

The pH is higher when the concentration of Hydrogen ion is 0.0002M.

-log of solution X =pH 1.3

-log of solution Y=pH 3.7

Solution X is the more acidic solution and has a lower pH.

Solution Y is the more basic solution and has a higher pH.

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