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Slav-nsk [51]
3 years ago
14

Explain the various factors that impact the solubility of substances in water.

Chemistry
2 answers:
Mashutka [201]3 years ago
5 0

Answer

Hi, the factors are;

Temperature

molecular size of solute

stirring

Explanation

An increase in temperature increases the solubility rate.Large solute molecules have larger molecular weight and size, thus less soluble. Stirring increases the speed of the dissolving process. In addition, polarity affects solubility in that solutes dissolve in solvents that share similar polarity.

All the best!

Andreyy893 years ago
5 0

Answer:  Temperature, Molecular Size of the particle, Polarity, Stirring

Explanation:  Solubility of substances in water depends upon the below mentioned factors -

1. Temperature - Higher the temperature, higher will be the kinetic energy of the particles which will move in random directions. Thus the particle will nt remain as precipitate in the solution and will try to get dissolved.

2. Molecular Size of the particle - It is more difficult for the solvent to dissolve the particle with large molecular size as it will take high temperature to get dissolved.

3. Polarity - 'Like dissolves like' explains the polarity concept of the solubility. It means that the non polar solute will get dissolved in non polar solvents and polar solutes will get dissolved in polar solvents only.

4. Stirring - Stirring only helps to increase the speed of the process of solubility. It has nothing to do with the substance.

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What is the concentration of a solution containing 1.11 g sugar (sucrose, C12H22O11, MW = 342.3 g/mol, d = 1.587 g/cm3) in 432 m
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Answer:

0.0075 M

0.0060 m

Explanation:

Our strategy here is to use the definition of molarity and molality to solve this question.

The molarity is the number of moles of solute, sucrose in this case, per liter of solution.

The molality is the number of moles of solute per kilogram of solvent.

So the molarity of the  solution is

M = moles of solute/ V solution

As we see we need the volume of solution since we are only given the volume of solvent, but this will be easy to compute since we have the density of  sucrose.

So determine the moles of sucrose , and the volume of solution:

Moles sucrose = 1.11 g/342.3 g/mol = 3.24 x 10⁻³ M

Volume of solution = Vol Sucrose + Vol glycerine

d = m/V ⇒ Vsucrose = m / d = 1.11 g/ 1.587 g/cm³ = 0.70 cm³

Vol solution = 432 mL + 0.70 mL = 432.7 mL  (1cm³  = 1 mL)

Vol solution = 432.7 mL x 1 L / 1000 mL = 0.4327 L

⇒ M = 3.2 x 10⁻³  mol / 0.4327 L = 0.0075  M

For the molarity what we need is to first calculate the kilograms of glycerine from the given density:

d = m/v ⇒ m = d x v = 1.261 g/cm³ x  432 cm³ = 544.75 g

Converting to Kg:

544.75 g x 1 Kg/ 1000 g = 0.544 kg

Now the molality is

m = mol sucrose/ kg solvent = 3.24 x 10⁻³ mol / 0.544 Kg = 0.0060 m

Note: In the calculation for  volume of solution we could have approximated it to that of just glycerine, but since the density of sucrose was given we calculated the total volume of solution to be more rigorous.

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