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Gala2k [10]
3 years ago
7

In a laboratory preparation room one may find a reagent bottle containing 5.0 L of 12 M NaOH. Write a set of instructions for th

e production of 250 mL of 3.5 M NaOH from such a solution.
Chemistry
1 answer:
kari74 [83]3 years ago
3 0

<u>Answer:</u> The volume taken from the reagent bottle must be 72.91 mL

<u>Explanation:</u>

To calculate the volume of concentrated solution, we use the equation:

M_1V_1=M_2V_2

where,

M_1\text{ and }V_1 are the molarity and volume of the concentrated solution  which is the reagent bottle.

M_2\text{ and }V_2 are the molarity and volume of diluted solution which is the solution to be prepared.

We are given:

M_1=12M\\V_1=?mL\\M_2=3.5M\\V_2=250mL

Putting values in above equation, we get:

12\times V_1=3.5\times 250\\\\V_1=72.91mL

Hence, the volume taken from the reagent bottle must be 72.91 mL

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How many moles of aluminum metal are required to produce 4.04 L of hydrogen gas at 1.11 atm and 27 °C by reaction with HCl? ​
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0.121 moles of aluminum metal are required to produce 4.04 L of hydrogen gas at 1.11 atm and 27 °C by reaction with HCl

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To make 3 moles of H₂, we need 2 moles of Al.

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