Chemistry HELP

wtf

ikr

For the reaction: Ba(OH)2 + 2HNO3 → Ba(NO3)2 + 2H2O, if we have 1.00 dm3 of Ba(OH)2 of concentration 0.75 moles dm-3, and 4 moles dm-3 HNO3 what is the volume of HNO3 needed in dm3?

Help please

I'm assuming this is a titration calculation question.

First calculate how many moles of Ba(OH)₂ you have.
Then find the mole ratio of Ba(OH)₂ : HNO₃ by looking at the symbol equation.
From that, you can find the number of moles of HNO₃ you need.
Then since you know the concentration of HNO₃ you can find the volume.

For the reaction: Ba(OH)2 + 2HNO3 → Ba(NO3)2 + 2H2O, if we have 1.00 dm3 of Ba(OH)2 of concentration 0.75 moles dm-3, and 4 moles dm-3 HNO3 what is the volume of HNO3 needed in dm3?

Help please

moles of Ba(OH)2= concentration x volume = 0.75
the molar ratio of Ba(OH)2NO3 is 1:1 from the equation, so there is equal moles
therefore the volume of HNO3 is moles/concentration so 0.75/4=0.1875dm3 which seems quite small but yeah...

But the options given to me were:
a) 0.75 dm3
b) 0.075 dm3
c) 0.375 dm3
d) 0.0375 dm3

moles of Ba(OH)2= concentration x volume = 0.75
the molar ratio of Ba(OH)2NO3 is 1:1 from the equation, so there is equal moles
therefore the volume of HNO3 is moles/concentration so 0.75/4=0.1875dm3 which seems quite small but yeah...

For the reaction: Ba(OH)2 + 2HNO3 → Ba(NO3)2 + 2H2O, if we have 1.00 dm3 of Ba(OH)2 of concentration 0.75 moles dm-3, and 4 moles dm-3 HNO3 what is the volume of HNO3 needed in dm3?

Help please

a^2+b^2=c^2

I think this might help.