Flashcards for JEE Chemistry - Solutions Class 12

 Page 1


Solutions
Flash cards
Page 2


Solutions
Flash cards
Concentration Terms (Continued)
1) % Concentration :
= weight of solute/100 g of solution. 
·· It does not change on changing temperature.
Ex. 10% w/w urea solution
= 10 gm of urea is present in 100 gm of solution.
= 10 gm of urea is present in 90 gm of water.
Page 3


Solutions
Flash cards
Concentration Terms (Continued)
1) % Concentration :
= weight of solute/100 g of solution. 
·· It does not change on changing temperature.
Ex. 10% w/w urea solution
= 10 gm of urea is present in 100 gm of solution.
= 10 gm of urea is present in 90 gm of water.
Concentration Terms (Continued)
1) % Concentration:
• % wt/vol (w/v)
% w/v = wt. of solute/100 ml of solution
It changes on changing temperature.
Ex. 10% (w/v) urea solution = 10 gm of urea is present in 100 mL of solution. But
not 10 gm of urea present in 90 ml of water.
For dilute solution : vol. solution = vol. solvent.
Page 4


Solutions
Flash cards
Concentration Terms (Continued)
1) % Concentration :
= weight of solute/100 g of solution. 
·· It does not change on changing temperature.
Ex. 10% w/w urea solution
= 10 gm of urea is present in 100 gm of solution.
= 10 gm of urea is present in 90 gm of water.
Concentration Terms (Continued)
1) % Concentration:
• % wt/vol (w/v)
% w/v = wt. of solute/100 ml of solution
It changes on changing temperature.
Ex. 10% (w/v) urea solution = 10 gm of urea is present in 100 mL of solution. But
not 10 gm of urea present in 90 ml of water.
For dilute solution : vol. solution = vol. solvent.
Concentration Terms (Continued)
1) % Concentration :
• % v/v
If both solute & solvent are liquids = volume in (mL) of solute per 100 mL of 
solution.
Ex. 10% v/v alcohol ethanol aq solution = 10 ml of ethanol in 100 ml of solution.
?10 ml of C
2
H
5
OH in 90 ml of H
2
O
Page 5


Solutions
Flash cards
Concentration Terms (Continued)
1) % Concentration :
= weight of solute/100 g of solution. 
·· It does not change on changing temperature.
Ex. 10% w/w urea solution
= 10 gm of urea is present in 100 gm of solution.
= 10 gm of urea is present in 90 gm of water.
Concentration Terms (Continued)
1) % Concentration:
• % wt/vol (w/v)
% w/v = wt. of solute/100 ml of solution
It changes on changing temperature.
Ex. 10% (w/v) urea solution = 10 gm of urea is present in 100 mL of solution. But
not 10 gm of urea present in 90 ml of water.
For dilute solution : vol. solution = vol. solvent.
Concentration Terms (Continued)
1) % Concentration :
• % v/v
If both solute & solvent are liquids = volume in (mL) of solute per 100 mL of 
solution.
Ex. 10% v/v alcohol ethanol aq solution = 10 ml of ethanol in 100 ml of solution.
?10 ml of C
2
H
5
OH in 90 ml of H
2
O
Concentration Terms (Continued)
2) Strength of solution in g/L :
Weight of solute (in gram) per litre (1000mL) of solution.
Ex. 10% (w/v) sucrose solution then specify its conc. in gm/L
100 mL ……. 10 gm