I’m not sure what normality is, but it looks like they’re asking about this formula:
Strength of HCl x volume of HCl = strength of NaOH x volume of NaOH.
So,
2 x 500 = 0.2 x volume of NaOH
1000 / 0.2 x volume of NaOH
5000 ml = volume of NaOH
5 L = volume of NaOH
Thankyou for replying,
what formula is this?
Is Strength and molarity the same thing?
Yes I think strength and molarity are the same here.
But I think there’s a simpler way to solve this.
NaOH and HCl are both strong bases and acids. So you will end up with salt (NaCl) and water (H2O).
And the molar ratio will be 1:1.
So if you look at the question, there is 2.0 M of HCl, but only 0.2 M of NaOH. So there is only 1/10 of the amount of NaOH that we need for the reaction. Again, the molar ratio needs to be 1:1.
To make up for the shortfall, the volume of NaOH needs to be 10 times the volume of HCl that we have.
Since we have 500 ml of HCl, we need 5000 ml of NaOH. Which is 5 liters.