Question

a solution of 175 ml of a 1.6 m solution of licl is diluted to 1.0 l. what is the concentration of the diluted solution in moles/liter?
0.28 m
0.013 m
1.3 m
0.51 m
question 22
1 pts
what volume of 0.250 m kcl is needed to make 100.0 ml of 0.100 m solution?
40 ml
56 ml
25 ml
250 ml

Explanation:

Question 1

Step1: Recall dilution formula

$M_1V_1 = M_2V_2$

Step2: Convert volume to liters

$V_1=175\ mL = 0.175\ L$, $M_1 = 1.6\ M$, $V_2 = 1.0\ L$

Step3: Solve for $M_2$

$M_2=\frac{M_1V_1}{V_2}=\frac{1.6\ M\times0.175\ L}{1.0\ L}= 0.28\ M$

Step1: Use dilution formula

$M_1V_1 = M_2V_2$

Step2: Identify values

$M_1 = 0.250\ M$, $M_2=0.100\ M$, $V_2 = 100.0\ mL$

Step3: Solve for $V_1$

$V_1=\frac{M_2V_2}{M_1}=\frac{0.100\ M\times100.0\ mL}{0.250\ M}=40\ mL$

Answer:

0.28 M

Question 2