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Finger [1]
2 years ago
14

In an extraction procedure, it is advisable to: save all layers until the experiment is complete. throw away all layers as soon

as you have extracted them. put the aqueous layer down the drain. put the organic layer in the aqueous waste.
Chemistry
1 answer:
LenKa [72]2 years ago
4 0

All the layers should be kept until the experiment is complete.

<h3>What is extraction?</h3>

In chemistry, solvent extraction is accomplished by adding a sample containing the substance to be separated into a system of two solvents, an aqueous layer and an organic layer.

It is important to note that all the layers should be kept until the experiment is complete. No layer ought to be discarded before the work is completed.

Learn more about solvent extraction:brainly.com/question/11041092

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Consider the two triangles shown below.
attashe74 [19]

Triangles may be regarded as similar or congruent on the following basis;

1) Side angle side (SAS)

2) Side side side (SSS)

3) Angle Angle side (AAS)

<h3>What is a triangle?</h3>

A triangle is a three sided figure. The figures are not shown here. However, two triangle may be regarded as similar or congruent by the following conditions;

1) Side angle side (SAS)

2) Side side side (SSS)

3) Angle Angle side (AAS)

Since the triagles are not shown here, the similarity of the triangles can not be established.

Learn more about triangles: brainly.com/question/25813512

8 0
3 years ago
How many grams of sodium benzoate should be added to prepare the buffer? Neglect the small volume change that occurs when the so
expeople1 [14]

Answer:

2.72 grams

Explanation:

Complete question is

You are asked to pre pare a pH = 4.00 buffer starting from 1.50 L of 0.0200 M solution of benzoic acid

(C6H5COOH)

and any amount you need of sodium benzoate

(C6H5COONa)

How many grams of sodium benzoate should be added to prepare the buffer? Neglect the small volume change that occurs when the sodium benzoate is added.

Solution

Given

pH of the buffer solution = 4

Concentration of C6H5COOH = 0.02 M

Volume of the buffer solution = 1.50 L

K_a value for benzoic acid is 6.3 * 10^ {-5}

Concentration of sodium benzoate

pH = - log Ka + log \frac{C6H5COONa}{C6H5COOH}

Substituting the given values we get

log \frac{C6H5COONa}{C6H5COOH}  = 4 + log (6.3 * 10^ {-5})\\log \frac{C6H5COONa}{C6H5COOH}  = -0.20\\\frac{C6H5COONa}{C6H5COOH} = 10^{-0.2}\\{C6H5COONa} = 10^{-0.2} * 0.02\\{C6H5COONa} =  0.63 * 0.02\\{C6H5COONa} =  0.0126 M

Number of moles in sodium benzoate

= 0.0126 * 1.5 \\= 0.0189 Mol

Mass of sodium benzoate

0.0189 mol * 144.147 \frac{g}{mol} \\= 2.72 g

3 0
3 years ago
Do substances have to be cold to freeze?
ololo11 [35]
No because anything can freeze but the warmer it is the longer it will take to be fully frozen. If you want the substance to freeze faster have it be cold by putting it in the fridge or something.
6 0
3 years ago
Read 2 more answers
Which type of protein controls what goes into and out of cells?
Ket [755]
The answer will be b. membrane.
3 0
3 years ago
How many unchanged atoms would remain after 3 half-lives if the initial sample had 600 atoms? Explain.
Leviafan [203]
75 divide 600/2 300/2 150/2
7 0
4 years ago
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