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Ne4ueva [31]
3 years ago
9

What are the standard ways to make a solution of known concentration? (select all that apply.)?

Chemistry
1 answer:
MatroZZZ [7]3 years ago
8 0

1- Molar solutions: based on number of moles of chemical in 1 litre of solution

2- Weight % solution:  the weight of chemical divided by the total weight of the solution (chemical + water) and multiplied by 100.

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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
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<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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The energy transferred between samples of matter because of a difference in their temperatures is called a. heat.

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Thermochemistry is the study of the transformations of heat energy on the chemical reactions. Chemical kinetics is the study of the rate of chemical reactions. And temperature is the measure of the heat.

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