Question

What is the approximate hydronium ion concentration and hydroxide ion concentration in bleach? Which is higher?

Answer 1

@radar @RH @thomaster @oldrin.bataku @Preetha @skullpatrol @sarahusher @snorl4x @shwethasm @dan815 @ganeshie8 @joemagee @karatechopper @kaysnd77 @louise1958 @LohitKSG

Answer 2

@hartnn @josepho16 @joemagee @karatechopper @kaysnd77 @LohitKSG @sarahusher @skullpatrol

Answer 3

We can calculate that.
First of all, is bleach acidic or basic?

Answer 4

@thomaster basic

Answer 5

That's correct
Now what would you expect to be higher knowing that bleach is highly basic, the hydronium or hydroxide ion concentration?

Answer 6

@thomaster i dont know

Answer 7

Do you know what hydronium and hydroxide ions are?

Answer 8

@thomaster no

Answer 9

Hydronium = \(\large [H_3O]^+\), you could also write it as \(\large [H]^+\)
Hydroxide = \(\large [OH]^-\)

more hydronium = acidic
more hydroxide = basic

Do you know how to calculate pH and pOH?

Answer 10

no @thomaster

Answer 11

@thomaster whith the strip?

Answer 12

No the pH strip is just a simple test.
To calculate the pH use this formula: \(\Large pH=-log[H_3O]^+\)

But we don't know the \([H_3O]^+\), we only know the appriximate pH of bleach (13)
So we need to reverse the formula: \(\Large [H_3O]^+=10^{-pH}\)

So now calculate \(\large [H_3O]^+=10^{-13}\)

Answer 13

@thomaster yea i dont understand

Answer 14

We know the pH of bleach is 13 right?
You can calculate the \([H_3O]^+\)(hydronium ion) concentration for that.
Just use \( [H_3O]^+=10^{-13}=1.0*10^{-13}M\) (M=mol/liter)
That's it, the hydronium ion concentration.

Now we have to calculate the hydroxide ion concentration.
We need the pOH to calculate that one.
pOH=14-pH
the pH is 13
so the pOH = 14-13 = 1

Now use the pOH to calculate the \([OH]^-\), which is \(\large 10^{-pOH}\)
\(\large 10^{-1}\)= 0.1M

So the hydroxide ion concentration is higher than the hydronium ion concentration

Answer 15

Do you understand any of this?

Answer 16

@thomaster no

Answer 17

What part do you not understand?

Answer 18

@xxxbeehivesallyxxx Still there?