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There is a formula to find pH pH = -log [H + ] or pH = -log [ H 3 O + ]

pH. pH. 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. Finding the [H + ].

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There is a formula to find pH pH = -log [H + ] or pH = -log [ H 3 O + ]

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  1. pH

  2. pH • There is a formula to find pH • pH = -log [H+] or pH = -log [H3O+] • (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

  3. 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 H2SO4solution, what is [H3O+]?

  4. 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 [H3O+] • It has a pH of 6

  5. 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?

  6. pH • What is the pH is you have a 2.3x10-4 M HNO3 solution? • What is the pH is you have a 5.6x10-5M H2CO3solution?

  7. pH • You can undo pH using the following formulas • [H+] = 10-pH or [H3O+] = 10-pH • What is the [H+] if the pH is 5.6? • What is the [H3O+] if the pH is 8.7?

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

  9. 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-]?

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

  11. pOH • What is the pOHis you have a 5.6x10-3M LiOHsolution? • What is the pOHis you have a 4.7x10-5M Sr(OH)2solution?

  12. 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?

  13. 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?

  14. Formulas • pH = -log [H+] or pH = -log [H3O+] • pOH = -log [OH-] • [H+] = 10-pH or [H3O+] = 10-pH • pOH = -log [OH-] • pH + pOH = 14

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