Question

1. what is the concentration of 1000. ml of 2.50 m kbr?

a) 5.00 m
b) 1.25 m
c) 0.400 m
d) 2.50 m

Explanation:

Step1: Understand the concept of molarity

Molarity ($M$) is a measure of the concentration of a solution. It is defined as the number of moles of solute per liter of solution. The formula for molarity is $M=\frac{n}{V}$, where $n$ is the number of moles of solute and $V$ is the volume of the solution in liters.

Step2: Analyze the given information

In this problem, we are given a solution of $KBr$ with a molarity of $2.50\ M$. The volume of the solution is $1000\ mL = 1\ L$. The concentration (molarity) of a solution is an intrinsic property of the solution (assuming no dilution or concentration processes like adding more solute or solvent).

Step3: Determine the concentration

Since no operation (such as dilution, evaporation, or adding more solute) is mentioned to change the amount of solute per unit volume, the concentration of the $KBr$ solution remains the same as the initially given value.

Answer:

D. 2.50 M