acid qst

[lacoste]

50 mL of 0.0100 M hydrochloric acid is added to 50 mL of 0.0100 M sodium hydroxide solution?

What is the pH of the solution?

[hyperblade01]

Find the mol of each

Because one is acid and the other is base, they neutralise each other. In this case it's a 1:1 ratio so if you have 2 mol of HCl and 1.5 mol of NaOH, 1.5mol of each would be neutralised leaving 0.5mol of NaOH left


You would normally take the remaining H+ or OH- and use those pH equations to find pH but in this case there's no remainder to use.. wonder if you can calculate it


But from just looking at it, the pH is going to be 7 (unless i've missed something)

[TrueTears]

There are no left over or ions. Hence they completely neutralize each other.

Resulting pH = 7.

[shinny]

Although you should be able to do that question just by looking at it =\ Many multiple choice pH questions aren't meant to require proper stoic working out given the time allotted.

[chem-nerd]

and of course assuming that this reaction is at 25°C