Advertisements
Advertisements
प्रश्न
Define the following modes of expressing the concentration of a solution. Which of these modes are independent of temperature and why?
(iii) w/V (mass by volume percentage)
Advertisements
उत्तर
It is mass by volume percentage (W/v): thus mathematically,
= `"W of solute"/"100 ml of solution" xx 100`
where W is weight of solute in grams, but measures volume of solution in mililitres (ml)
APPEARS IN
संबंधित प्रश्न
Calculate the molarity of the following solution:
30 g of Co(NO3)2 . 6H2O in 4.3 L of solution.
Concentrated nitric acid used in laboratory work is 68% nitric acid by mass in aqueous solution. What should be the molarity of such a sample of the acid if the density of the solution is 1.504 g mL−1?
An antifreeze solution is prepared from 222.6 g of ethylene glycol (C2H6O2) and 200 g of water. Calculate the molality of the solution. If the density of the solution is 1.072 g mL−1, then what shall be the molarity of the solution?
If the solubility product of CuS is 6 × 10−16, calculate the maximum molarity of CuS in aqueous solution.
A sample of 12 M Concentrated hydrochloric acid has a density 1.2 M gL-1 calculate the molality.
Which of the following is a quantitative description of the solution?
Molarity of liquid HCl will be if the density of the solution is 1.17 gm/cc.
10 g of NaCl is dissolved in 106 g of the solution. Its concentration is ____________.
Mole fraction of the solute in a 1.00 molal aqueous solution is ____________.
For preparing 0.1 N solution of a compound from its impure sample of which the percentage purity is known, the weight of the substance required will be:
Which of the following units is useful in relating concentration of solution with its vapour pressure?
Which of the following concentration unit is independent of temperature?
4 L of 0.02 M aqueous solution of NaCl was diluted by adding one litre of water. The molality of the resultant solution is ______.
Define the following modes of expressing the concentration of a solution. Which of these modes are independent of temperature and why?
m (Molality)
Match List-I with List-II:
| List-I | List-II |
| A. ppm | I. molL-¹ |
| B. Molarity | II. No units |
| C. Molality | III. Independent of temperature |
| D. Mole fraction | IV. Very dilute solutions |
Choose the correct answer from the options given below:
The number of electrons involved in the reduction of one nitrate ion to hydrazine is
250 mL of 0.5 M NaOH was added to 500 mL of 1 M HCl. The number of unreacted HCl molecules in the solution after complete reaction is ______ × 1021. (Nearest integer) (NA = 6.022 × 1023).
A 5% solution of \[\ce{Na2SO4.10H2O}\] (MW = 3 22) is isotonic with 2% solution of non- electrolytic, non volatile substance X. Find out the molecular weight of X.
Calculate the molarity of the following solution:
30 mL of 0.5 M H2SO4 diluted to 500 mL.
