Questions: THANK YOU IN ADVANCE 1. WHAT IS THE TERM FOR THE CONCENTRATION EXPRES

Question

Questions: THANK YOU IN ADVANCE

1. WHAT IS THE TERM FOR THE CONCENTRATION EXPRESSION THAT RELATES THE MOLES OF SOLUTE DISSOLVED IN EACH LITER OF SOLUTION?

A. MOLARITY

B. MASS/MASS PERCENT

C. MOLALITY

D. PARTS PER MILLION

E. NONE OF THESE

2. WHAT IS THE TERM FOR A SOLUTION CONTAINING THE MAXIMUM SOLUTE THAT CAN DISSOLVE AT A GIVEN TEMPERATURE?

A. SATURATED

B. SUPERSATURATED

C. UNSATURATED

D. CONCENTRATED

E. NONE OF ABOVE

3. WHICH OF THE FOLLOWING ILLUSTRATES THE LIKE DISSOLVES LIKE RULE FOR TWO LIQUIDS?

A. a POLAR SOLUTE IS MISCIBLE W A NONPOLAR SOLVENT

B. A NONPOLAR SOLVENT IS MISCIBLE WITH A POLAR SOLVENT

C. A POLAR SOLUTE IS IMMISCIBLE WITH A POLAR SOLVENT

D. A NONPOLAR SOLUTE IS MISCIBLE WITH A NONPOLAR SOLVENT

E. NONE OF ABOVE

4. APPLY THE LIKE DISSOLVES LIKE RULE TO PREDICT WHICH OF THE FOLLOWING LIQUIDS IS MISCIBLE WITH WATER

A. ETHANOL, C2H5OH

B. TOLUENE, C7H8

C. CARBON TETRACHLORIDE, CCL4

D. ALL OF THESE

E. NONE OF THESE

5. WHICH OF THE FOLLOWING INCREASES THE RATE OF DISSOLVING FOR A SOLID SOLUTE IN A SOLVENT?

A. HEATING THE SOLUTION

B. GRINDING THE SOLUTE

C. STIRRING THE SOLUTION

D. ALL OF THE ABOVE

E. NONE OF THE ABOVE

6. WHAT IS THE MASS OF SOLUTE DISSOLVED IN 10.0 G OF A 5.00% SUGAR SOLUTION?

A. 0.900g

B 9.50 g

C 0.500g

D 0.180 g

E 10.0 g

THANK YOU!!!!!!!!!!!!!!!!!!!!!!!!

Explanation / Answer

1) we know that that 1 M solution is 1 moles of solute dissolved in 1 L of solvent. 1 M = 1mole / 1 L
Hence answer is option A) Molarity.

2) A saturated solution is a chemical solution containing the maximum concentration of a solute dissolved in the solvent at a given temperature. Additional solute will not dissolve in a saturated solution. hence answer is option A) Saturated.

3) Non-polar solute and non-polar solvent are like-to-like and so they are miscible. Hence answer is option D) a nonpolar solute is miscible with a nonpolar solvent.

4) Water is a polar solvent, hence it will be miscible with polar solute. Only Ethanol is the polar compound, Toluene and CCl4 are non-polar than water. Hence Ethanol will be miscible with water. Answer is option A) Ethanol, C2H5OH.

5) Heating the solution: by heating we are increasing internal energy of a solution and hence solute particles will be dissolved faster as they will interact faster with solvent molecules. Thus heating the solution will increase the rate of dissolution.
Grinding the solute: by grinding we are increasing available surface area of solute partilces to interact with solvent molecules and hence it will increase the rate of dissolution.
Stirring the solution: by stirring as well we are increasing frequency of collision of solvent molecules and solute particles. Thus stirring will also increase the rate of dissolution.
Hence answer is option D) all of the above.

6) given, 5.00% of sugar solution, and total weight of solution is 10.0g. Hence 5% of 10.0g = 0.05*10 = 0.500 g
Thus 0.5 g of sugar dissolved in 9.5 g of water will make 5% sugar solution of 10.0g.
Hence answer is option C) 0.500 g .

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