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3 years ago

Which salt shows the least solubility change when the temperature is increased from 0 to 100 c?

Chemistry

2 answers:

sergey [27]3 years ago

5 0

Correct answer: NaCl (sodium chloride)

Solubility of a salt is the amount of salt in grams that can be dissolved in 100 mL of water at a particular temperature. The solubility curve shows the amount of a particular salt that can be dissolved in 100 mL of water at different temperatures. For most of the salts, solubility increases as the temperature raises. But there are some ammonium salts, the solubility decreases as the temperature is increased. Sodium chloride is the salt whose solubility remains unaffected as the temperature increases from $0^{0}C to 100^{0}C$

Hunter-Best [27]3 years ago

4 0

Sodium chloride (NaCl), whose only changes about 5g/100mL water over that entire range 100°C)

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3 years ago

A solution is made using 148.5 g of dimethyl ether (MM = 46.07 g/mol) and 90.0 g of methanol (MM = 32.04 g/mol). What is the mol

Mariulka [41]

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0.534

Explanation:

Mole fraction can be calculated using the formula:

Mole fraction = number of moles of solute ÷ number of moles of solvent and solute (solution).

In this question, solute is dimethyl ether while the solvent is methanol.

Mole (n) = mass (M) ÷ molar mass (MM)

Mole of solute (dimethyl ether) = 148.5 ÷ 46.07

= 3.22moles.

Mole of solvent (methanol) = 90 ÷ 32.04

= 2.81moles.

Total moles of solute and solvent = 3.22 + 2.81 = 6.03moles.

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Mole fraction = 3.22/6.03

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