Question

Mixing 10 mL of 3M HCl with 30 mL of 1M HCl will give HCl solution with concentration
(A) 1.0M
(B) 1.5 M
(C) 2.0 M
(D) 4.0 M​

Answer 1

Answer:

Answer is 1M solution by M1V1=M2V2 method

Explanation:

Answer 2

Answer:

B

Explanation:

moles will be conserved

so moles initial = moles final

by molarity formula

3M = (X/10)*1000          (X = moles of solute)

X=0.03

similarly in 2nd part

X=0.03 (by molarity formula)

X + X = final moles

0.06 = (40*Mf)/1000       (Mf=final molarity)

Mf = 1.5M