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50 sucrose so...

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50 sucrose solution which is 40% by mass is heated till it become 50% by mass . water lost from 100g of the solution

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100

gm of an aq. solution of sugar contains

40 %

sugar by mass. How much water should be evaporated get

50 %

sugar solution by mass?

(I)

1 M

solution of sucrose

(C_{12} H_{22} O_{11}

) can be prepared by dissolving

342.20 g

of sucrose to make

1000 m L

of sugar water solution.

(I I)

. The molar mass of sucrose is

342.20 g

1 L

of water is the same as

100 g

.

Q. The following successive dilutions are applied to a stock solution of 5 M sucrose (molecular weight = 342):

Solution A: 50 mL of stock solution is diluted to 250 mL
Solution B: 50 mL of solution A is diluted to 100 mL
Solution C: 100 mL of solution B is diluted to 1000 mL

What is the concentration, in %(w/V) of sucrose in solution C?

300

g of an aqueous solution of a particular solute (containing

30

% solute by mass) is mixed with

400

g of another aqueous solution of the same solute (containing

40

% solute by mass). In the final solution, mass

%

[Given, Molecular mass of solute

= 50

]

Q. Question 19
The teacher instructed three students 'A'. 'B' and 'C' respectively to prepare a 50% (mass by volume) solution of sodium hydroxide (NaOH). A' dissolved 50g of NaOH in 100 mL of water. 'B' dissolved 50g of NaOH in 100g of water while C dissolved 50g of NaOH in water to make 100 mL of solution. Which one of them has made the desired solution and why?

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