Question

# Calculate the pH of each solution given the following [H3O+] or [OH−] values. Part A: [H3O+]...

Calculate the pH of each solution given the following [H3O+] or [OH−] values.

Part A: [H3O+] = 3×10−4 M

Part B: [H3O+] = 2×10−9 M

Part C: [OH−] = 4×10−5 M

Part D: [OH−] = 4.5×10−11 M

Part E: [H3O+] = 5.1×10−8 M

Part F: [OH−] = 8.0×10−4 M

A)

we have below equation to be used:

pH = -log [H3O+]

= -log (3*10^-4)

= 3.5

B)

we have below equation to be used:

pH = -log [H3O+]

= -log (2*10^-9)

= 8.7

C)

we have below equation to be used:

pOH = -log [OH-]

= -log (4*10^-5)

= 4.4

we have below equation to be used:

PH = 14 - pOH

= 14 - 4.4

= 9.6

D)

we have below equation to be used:

pOH = -log [OH-]

= -log (4.5*10^-11)

= 10.3

we have below equation to be used:

PH = 14 - pOH

= 14 - 10.3

= 3.7

E)

we have below equation to be used:

pH = -log [H3O+]

= -log (5.1*10^-8)

= 7.3

F)

we have below equation to be used:

pOH = -log [OH-]

= -log (8*10^-4)

= 3.1

we have below equation to be used:

PH = 14 - pOH

= 14 - 3.1

= 10.9

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