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1 vote
The volume of 7.91 M HCl needed to make 196.1 mL of 2.13 M HCl is ____.

Select one:
a. 52.8
b. 728
c. 0.198
d. 3490

User Cunnel
by
8.3k points

2 Answers

3 votes

Answer:

a) 52.8

Step-by-step explanation:

M1V1 = M2V2

(7.91 M)(x ml) = (2.13 M) (196.1 ml)

(7.91M) (xml) = 417.693 M.ml

x ml = 417.693/ 7.91

x = 52.8

User Adam Fyles
by
8.5k points
5 votes

Answer:

A. 52.8

Step-by-step explanation:

We make use of the dilution formula to solve this


M_1* V_1 =M_2* V_2

Where (
M_1 and
M_2 are the initial molarity and final molarity and
V_1 and
V_2 are the initial volume and final volume)

Plugging into the values in the formula


M_1* V_1 =M_2* V_2


7.91M * V_1=2.13M * 196.1mL


V_1=\frac {(2.13M * 196.1mL)}{7.91M}

= 52.8 mL is the Answer

User Marco Jr
by
7.6k points