What is the [H3O+] of a solution with [OH-] = 6.3 × 10-4 M?

Question 7 options:

6.3 × 10-18 M

1.6 × 10-11 M

6.3 × 10-4 M

10.80 M

Question

What is the [H3O+] of a solution with [OH-] = 6.3 × 10-4 M?

Question 7 options:
	
6.3 × 10-18 M

	
1.6 × 10-11 M

	
6.3 × 10-4 M

	
10.80 M

shall29 · Answer

@Photon336 
@vera_ewing
@desmarie 
@sweetburger

shall29 · Answer

@Preetha
@aaronq

jfraser · Answer

there's an important relationship between the [H+] and the [OH-] concentration in a solution, do you remember an equation for it?

shall29 · Answer

I don't remember at the moment. Could you help me refresh my memory?

shall29 · Answer

it has something to do with log right?

shall29 · Answer

@JFraser can you help me?

jfraser · Answer

to convert concentrations to pH, you'd use the log function, yes.

But the relationship between the H+ and OH- concentrations is $$[H^{+1}]*[OH^{-1}] = 1.00*10^{-14} = K_w $$

jfraser · Answer

which means the $product$ of the two concentrations will always be $constant$