HELP with chem question (1 Viewer)

[crazy_paki123]

its MC,
A mixture of 10 g of Sodium Carbonate and 10 g of Sodium Hydroxide was mixed and dissolved in water. What volume of 0.1 M HCl is needed to neutralise the solution?
A. 0.9 L
B. 1.9 L
C. 2.5L
D. 4.4 L

Working out will be much appreciated thanks

 

[crazy_paki123]

bump

 

[crazy_paki123]

please i need asap as my sister needs to know for her half yearlies

 

[Sy123]

its MC,
A mixture of 10 g of Sodium Carbonate and 10 g of Sodium Hydroxide was mixed and dissolved in water. What volume of 0.1 M HCl is needed to neutralise the solution?
A. 0.9 L
B. 1.9 L
C. 2.5L
D. 4.4 L

Working out will be much appreciated thanks

So we need to find the amount of HCl need to neutralise, this means we need to find out how much H+ there is, and the amount of H+ should be the same as OH-


So the concentration of [H+] = 0.1

So we need the concentration of OH- in the mixture to be 0.1

Look at the mixture:

Na2CO3 doesn't have any OH- so it won't contribute.

Look at



Lets calculate the moles of NaOh which we can since its 10g

We find that its about 0.25 mol

Now, OH- mols is 0.25

So

 

[crazy_paki123]

thanks