A sample of human blood was tested and found to have a pH of 7.43. Calculate [H3O+] and [OH-].

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(H30+)= 3,72 x 10 ^-8 M and (OH-)=2,69 x 10^-7 M

Explanation:

PH indicates the acidity or basicity of a substance. PH values between 0 and less than 7 indicate acidic solutions, 7 neutral and higher than 7 to 14 basic. It is calculated as

pH = -log (H 30+)

We solve: (H30)= antilog -pH= antilog -7.43

(H30+)= 3,72 x 10 ^-8 M

Both pH and pOH have a relationship to belonging to the same aqueous solution: the expression of the Kwater (ionic product of the water Kw) is used:

(H3O  +) x (OH  -) = 1x10 ^ -14

3,72 x10^-8 x(OH-)=1x10 ^ -14

(OH-) =1x10 ^ -14/3,72 x10^-8

(OH-)=2,69 x 10^-7 M

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the answer is:  

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