[H 3 O + ] Aqueous Solutions Brackets means concentration (Molarity) 1x10 -7 M neutral 1x10 -5 M 1x10 -9 M acidic = > [OH - ] acid base M

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Presentation transcript:

[H 3 O + ] Aqueous Solutions Brackets means concentration (Molarity) 1x10 -7 M neutral 1x10 -5 M 1x10 -9 M acidic = > [OH - ] acid base M M HCl + H 2 O H+H+ Cl -1 + H 3 O + contain both 1x10 -5 M >

more acidic 1x10 -3 M 1x M > 1x10 -7 M neutral 1x10 -5 M 1x10 -9 M acidic = > [OH - ] base [H 3 O + ] NaOH Na +1 + OH -1 Aqueous Solutions acid HCl + H 2 O Cl -1 + H 3 O + 1x10 -3 M

more acidic 1x M 1x10 -4 M basic < 1x10 -3 M 1x M > 1x10 -7 M neutral 1x10 -5 M 1x10 -9 M acidic = > [OH - ] base [H 3 O + ] NaOH Na +1 + OH -1 Aqueous Solutions acid 1x10 -4 M

more acidic 1x M 1x10 -4 M basic [H + ] x [OH - ]= 1x = K w < 1x10 -3 M 1x M > Aqueous Solutions 1x10 -7 M neutral 1x10 -5 M 1x10 -9 M acidic = > [OH - ] base [H 3 O + ] acid

pH = - log[H ] or pH = - log[H + ] What is the pH of water? Since water’s [H 3 O + ] is 1x10 -7 M, and pH = - log[H ] pH = - log[1x10 -7 ] pH = - [-7] pH = 7

more acidic 1x M 1x10 -4 M basic < 1x10 -3 M 1x M > Aqueous Solutions 1x10 -7 M neutral 1x10 -5 M 1x10 -9 M acidic = > [OH - ] base [H 3 O + ] acid water pH = 7

pH Scale neutral

more acidic 1x M 1x10 -4 M basic < 1x10 -3 M 1x M > Aqueous Solutions 1x10 -7 M neutral 1x10 -5 M 1x10 -9 M acidic = > [OH - ] base [H 3 O + ] acid water pH = 7 pH = 5

More acidic pH Scale neutral 5

more acidic 1x M 1x10 -4 M basic < 1x10 -3 M 1x M > Aqueous Solutions 1x10 -7 M neutral 1x10 -5 M 1x10 -9 M acidic = > [OH - ] base [H 3 O + ] acid water pH = 7 pH = 5 pH = 3

More acidic pH Scale neutral 5 3

more acidic 1x M 1x10 -4 M basic < 1x10 -3 M 1x M > Aqueous Solutions 1x10 -7 M neutral 1x10 -5 M 1x10 -9 M acidic = > [OH - ] base [H 3 O + ] acid water pH = 7 pH = 5 pH = 3 pH = 10

More acidic pH Scale neutral 5 3 More basic 10

What is the pH of a 0.01M HCl solution? HCl + H 2 O Cl - + H 3 O M pH = - log[H ] pH = - log[0.01] pH = - [-2] pH = M

What is the pH of a 0.01M Ca(OH) 2 solution? Ca(OH) 2 Ca OH M 0.02M pH = - log[H ] pH = - log[5x ] pH = - [-12.3] pH = M [H 3 O + ] x [OH - ]= 1x = K w [H 3 O + ] x [0.02]= 1x [H 3 O + ] = 5x10 -13

More acidic pH Scale neutral 5 3 More basic

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