Advertisements
Advertisements
प्रश्न
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 ______.
पर्याय
0.004
0.008
0.012
0.016
Advertisements
उत्तर
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 0.016.
Explanation:
Apply the relation: M1V1 = M2V2
Given: M1 = 0.02 M, V1 = 4 L, M2 = ?, V2 = 5 L
Therefore 0.02 × 4 L = M2 × 5 L
M2 = `0.08/5` = 0.016 M
APPEARS IN
संबंधित प्रश्न
Why is molality of a solution independent of temperature?
Define mass percentage.
If the density of some lake water is 1.25 g mL−1 and contains 92 g of Na+ ions per kg of water, calculate the molality of Na+ ions in the lake.
When KOH solution is added to potassium dichromate solution the colour of solution
changes to yellow, because _______
(A) chromate ion changes to dichromate ion
(B) dichromate ion changes to chromate ion
(C) oxidation number of chromium changes from + 6 to + 4
(D) oxidation number of chromium changes from + 4 to +6
Define molality.
Define Normality.
What is molal depression constant? Does it depend on nature of the solute?
An X molal solution of a compound in benzene has mole fraction of solute equal to 0.2. The value of X is ____________.
Which of the following concentration terms is/are independent of temperature?
Which of the following units is useful in relating concentration of solution with its vapour pressure?
Out of molality (m), molarity (M), formality (F) and mole fraction (x), those which are independent of temperature are:
What is molarity of resulting solution obtained by mixing 8.5 L of 0.5 m urea solution and 500 ml of 2 m urea solution?
3.36 M sulphuric acid solution is 29% H2SO4 calculate the density of the solution.
4.5 g of compound A (MW = 90) was used to make 250 mL of its aqueous solution. The molarity of the solution in M is x × 10−1. The value of x is ______. (Rounded-off to the nearest integer)
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 given solution of H2O2 is 30 volumes. Its concentration in terms of molarity is ______.
A sample of Ferrous sulphide reacts with dil. H2SO4 to from H2S which contains 9% hydrogen by volume. The percentage of fee in the sample, is ______.
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.
