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What pH would you expect for solutions with the concentrations given here?$$\begin{array}{l}{\text { a. }\left[\mathrm{H}^{+}\right]=1.0 \times 10^{-4} \mathrm{M}} \\ {\text { b. }\left[\mathrm{H}^{+}\right]=1.0 \times 10^{-12} \mathrm{M}} \\ {\text { c. }\left[\mathrm{OH}^{-}\right]=1.0 \times 10^{-8} \mathrm{M}}\end{array}$$

Chemistry 101

Chapter 16

Acidic Toxins

Section 3

[H+] and pH

Intro to Chemistry

Atoms, Molecules and Ions

Carleton College

University of Central Florida

University of Maryland - University College

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in problem three. What is the pH off these solutions off the following concentrations. So this question is taken from the topic pH So first parties so concentration off H plus hydrogen in is 1.0 into 10 days to power minus four Mueller. So we can apply this simple formula that it's ph physical toe minus log off H plus concentration. So with the help off this formula, we can easily find out the value off pH so we can can put this value in H plus concentration. So P H is equal to minus log off 1.0 in 10 days to power minus four. So on solving we get this value is for minus log 1.0. As we know, Law one is zero. So this value is come out of before. So the pH is four for this question. So for party pH is for so we can say it is a acidic solution and it is Theus Athletic solution. And in the part B, that is the main H plus concentration is given. That is the 1.0 in 10 days to power minus 12 Moeller so again, same, same same method Can we cannot play that we apply in the part? A soapy H is equal toe minus logo. Yeah, H plus iron concentration. So we get so minus low off 1.0 in 10 days to power minus 12. So on solving this log so we get this value is 12 minus log 1.0. As we know, log one value is zero. So we get 12 so ph physical 12. So that means this is the basic solution. Because for the basic solution, pH value is more than seven. So it is the basic solution against the basic, and I can write for log one. It is zero because Logan value zero against him because log one is zero now coming to the party that is hydroxide ion concentration, this time given as the hydroxide and concentration, which is 1.0 in 10 days to power minus eight Moeller. So, uh, we know this relationship between the pH and pH. So basically, ph and ph is equal to 14 at 25 degrees Celsius, so P O. H is equal to minus logo. Hydro ohh! Line that P O. H is equal to minus log off hydroxide. Ein, like Ph is equal to minus log off, hydrogen in and similarly P O. H is equal to minus log off hydroxide. And so that means we can solve this value. So which is 1.0 into 10 days to power minus eight. So on solving we get this is eight minus log 1.0. Look, one is again zero. So we get So this is the P O. H. We get And but we know that pH plus P O. H is equal toe 14. That mean p H is equal to 14 minus eight. That means pH is equal to six. So this it means the this solution is again acidic because ph value is if ph value is less than seven, it is acidic. And if ph value is more than seven, it is basic. And if ph value is equal toe nearby, equal to seven than it is neutral

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