Question

3 l of water are added to 2l of 5m hcl what is the molarity of hcl the resultant solution

Answer 1

1 litre of original solution contains = 5 moles of HCl ('coz Molarity=5M) 
2 litres of original solution contains= 10 moles of HCl 

Now, since the tot. volume is 2+3=5 litres and the no. of moles of HCl are the same, we get: 

5 litres of soln. contains = 10 moles of HCl 
1 litre of soln. ontains = 2 moles of HCl 

Thus, Molarity of resulting soln. = 2M 

Answer 2

Answer: 2M

Explanation:

5M of HCl with 2L volume contains 10 moles [ molarity= no. of moles/volume of solution]

Therefore.. new volume = 2+3=5

Hence, molarity= 10÷5 =2M

I hope it helps you!!!