Calculating the pH of solution (1 Viewer)

[Casson8]

I have a quick question which I've been stuck on,

Calculate the pH of the solution produced by mixing 50 mL of 0.1mol L^-1 HCl with 20mL of 0.05 mol L^-1 NaOH.

If anyone could help me out it would be muchly appreciated. Thanks in advance.

 

[nightweaver066]

1. Chemical equation
2. Calculate moles of each substance
3. Find whichever chemical is in excess
4. Find new concentration of hydrogen or hydroxide ions
5. Calculate new pH

Following my steps:
1.

2.



3.

Therefore HCl is in excess

4.



5.

And you can finish off the question.

 

[Sanjeet]

I wish I had read this before it was in my exam today -____-

 

[lilly luta]

1. Chemical equation
2. Calculate moles of each substance
3. Find whichever chemical is in excess
4. Find new concentration of hydrogen or hydroxide ions
5. Calculate new pH

Following my steps:
1.

2.



3.

Therefore HCl is in excess

4.



5.

And you can finish off the question.

Where did you get the 0.07 from?

 

[deswa1]

The total volume of the solution to work out concentration. There is 50mL of HCl and 20mL of NaOH

 

[Power Rangers]

Where did you get the 0.07 from?

20ml+50ml=70mls

 

[lilly luta]

20ml+50ml=70mls

oh, haha, sorry didn't see the 50ml Thanks guys

 

[xDarkSilent]

when is the exception when you have to times it by 3 if it is triprotic ?