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pH

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There is a formula to find pH pH = -log [H + ] or pH = -log [H 3 O + ] – (brackets around a substance means that substances concentration in molarity) To find the pH you need to H + concentration Most of the time you will get an acids concentration

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Finding the [H + ] To find [H+] you need to multiply the concentration of the acid by how many hydrogens are in the formula. So, if you have a 0.0015 M HCl solution, what is [H + ]? If you have a 0.0022 M H 2 SO 4 solution, what is [H 3 O + ]?

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pH If you have a [H + ] of 1x10 -6, use the formula to find the pH? Remember the formula is pH = -log [H + ] or pH = -log [H 3 O + ] It has a pH of 6

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pH If [H + ] = 1x10 -n, then pH = n If pH = n, then [H + ] = 1x10 -n What is the pH if [H + ] = 1x10 -9 ? What is the pH if [H + ] = 1x10 -4 ? What is the [H + ] if pH = 11? What is the [H + ] if pH = 5?

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pH What is the pH is you have a 2.3x10 -4 M HNO 3 solution? What is the pH is you have a 5.6x10 -5 M H 2 CO 3 solution?

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pH You can undo pH using the following formulas [H + ] = 10 -pH or [H 3 O + ] = 10 -pH What is the [H + ] if the pH is 5.6? What is the [H 3 O + ] if the pH is 8.7?

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pH scale How can you measure the pH of a base? Acid Base

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pOH You can find pOH using the following formula pOH = -log [OH - ] To find the pOH you need [OH - ] If you have a 0.00012 M Ca(OH) 2 solution, what is the [OH - ]?

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pOH If [OH - ] = 1x10 -n, then pOH = n If pOH = n, then [OH - ] = 1x10 -n What is the pOH if [OH - ] = 1x10 -3 ? What is the pOH if [OH - ] = 1x10 -9 ? What is the [OH - ] if pOH = 4? What is the [OH - ] if pOH = 8?

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pOH What is the pOH is you have a 5.6x10 -3 M LiOH solution? What is the pOH is you have a 4.7x10 -5 M Sr(OH) 2 solution?

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pOH You can undo pH using the following formulas [OH - ] = 10 -pOH What is the [OH - ] if the pH is 2.7? What is the [OH - ] if the pH is 4.8?

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pH and pOH pH + pOH = 14 What is the pH if the pOH is 6.5? What is the pOH if the pH is 3.3?

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Formulas pH = -log [H + ] or pH = -log [H 3 O + ] pOH = -log [OH - ] [H + ] = 10 -pH or [H 3 O + ] = 10 -pH pOH = -log [OH - ] pH + pOH = 14

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pH scale Logarithmic scale –expressing H +1 concentration, [H +1 ] If pH changes by factor of 1, [H +1 ] changes by a factor of 10 pH = -log[H +1 ]pH.

pH scale Logarithmic scale –expressing H +1 concentration, [H +1 ] If pH changes by factor of 1, [H +1 ] changes by a factor of 10 pH = -log[H +1 ]pH.

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