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vfiekz [6]
3 years ago
10

If you needed to make 100 mL of a 0.2 M fruit drink solution from the 1.0 M fruit drink

Chemistry
1 answer:
telo118 [61]3 years ago
8 0

Answer:

We take 20.0 mL of the 1.0 M fruit drink solution and then add 80.0 mL of water to make 100 mL of a 0.2 M fruit drink solution.

Explanation:

Using the rule that: the no. of millimoles of a solution before dilution is equal to the no. of millimoles of the solution after the dilution. (MV) before dilution = (MV) after dilution. M before dilution = 1.0 M, V before dilution = ??? mL. M after dilution = 0.2 M, V after dilution = 100 mL. ∴ V before dilution = (MV) after dilution / M before dilution = (0.2 M)(100 mL) / (1.0 M) = 20.0 mL. So, we take 20.0 mL of the 1.0 M fruit drink solution and then add 80.0 mL of water to  make 100 mL of a 0.2 M fruit drink solution  

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Which of the following statements is true when considering temperature during a recrystallization? More than one answer may be c
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Answer:

The correct answer is:

<em>(1) It is important that the sample is dissolved in just enough hot solvent. </em>

Explanation:

The process of recrystallization is important to eliminate the impurities and to obtain better crystals of the solid. The solvent used to perform the recrystallization must have a high dissolution power of the substance to be recrystallized and a low dissolution power of the impurities. This is in order to eliminate most impurities. Furthermore, <em>It is important that the sample is dissolved in just enough hot solvent </em>because this should be easy to remove after the recrystallization and the crystal should form easily when the solution cools. Also, it is better to add the hot solvent to solubilize the crystals and keep the impurities insoluble, instead of adding the cold solvent and heating the solution. Additionally, the process of cooling the solution must be done slowly to obtain large and fewer crystals. A fast ice-cooling will form smaller crystals.

4 0
3 years ago
Chemistry Conversion
kvv77 [185]

Answer:

Explanation:

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3 years ago
How would you prepare a 1 L solution of 3 M MgO?
oksano4ka [1.4K]

Answer:  175.35g

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The mass of one mole of NaCl equals the MW of NaCl MW =  35.45 + 23 =58.45 g/mol

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3 years ago
A test light with an electrical resistance of 9.00 S2 draws a current of 1.50 A when
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Answer:

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Explanation:

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P = I²R.................... Equation 1

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From the question,

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3 years ago
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