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problem 1: Calculate the [H3O+] of a solution with pH of 4.20. problem 2: True or...

problem 1: Calculate the [H3O+] of a solution with pH of 4.20.

problem 2: True or False, The acidity of Al (H2O)6 derives from the positively charged aluminum ion which draws electrons from the oxygen atoms, in turn, weakening the O-H bond.

please answer both and explain, I'm having a hard time with acidity, will rate

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Answer #1

1)

we have below equation to be used:

pH = -log [H3O+]

4.2 = -log [H3O+]

log [H3O+] = -4.2

[H3O+] = 10^(-4.2)

[H3O+] = 6.31*10^-5 M

Answer: 6.31*10^-5 M

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