Question

Give pH of the following: Part C: [OH−]=7×10−2M Part D:[OH−]=7.0×10−3M Part E:[H3O+]=5.8×10−2M Part F:[OH−]=8.4×10−6M express answer...

Give pH of the following:

Part C: [OH−]=7×10−2M

Part D:[OH−]=7.0×10−3M

Part E:[H3O+]=5.8×10−2M

Part F:[OH−]=8.4×10−6M

express answer using two decimal places.

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Answer #1

C)

we have below equation to be used:

pOH = -log [OH-]

= -log (7*10^-2)

= 1.1549

we have below equation to be used:

PH = 14 - pOH

= 14 - 1.1549

= 12.8451

Answer: 12.84

D)

we have below equation to be used:

pOH = -log [OH-]

= -log (7*10^-3)

= 2.1549

we have below equation to be used:

PH = 14 - pOH

= 14 - 2.1549

= 11.8451

Answer: 11.84

E)

we have below equation to be used:

pH = -log [H3O+]

= -log (5.8*10^-2)

= 1.2366

Answer: 1.24

F)

we have below equation to be used:

pOH = -log [OH-]

= -log (8.4*10^-6)

= 5.0757

we have below equation to be used:

PH = 14 - pOH

= 14 - 5.0757

= 8.9243

Answer: 8.92

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