Question

Which sample contains the most concentrated solution of hydrochloric acid (HCI)?

800 mL of 2.00M HCI
b
2.00 L of 0.90M HCI
c
50 mL of 1.45M HCI
d
300 mL of 1.00MHCI

Answer 1

a. 800 mL of 2.00M HCI

Explanation:

The number in front of the M is the value of the molarity, the number of moles per liter in the solution. The larger that number is, the more concentrated the solution is. In this list, the 2.00M solution is the most concentrated.