Advertisements
Advertisements
Question
What will be the molality of the solution containing 18.25 g of \[\ce{HCl}\] gas in 500 g of water?
Options
0.1 m
1 M
0.5 m
1 m
Advertisements
Solution
1 m
Explanation:
The number of moles is given by the following formula,
Moles = `"Mass"/"Molar mass"` ......(1)
The number of moles of \[\ce{HCl}\] is calculated by using equation (1) as follows,
Moles of HCl = `(18.25 g)/((36.5 g)/(mol)` = 0.5 mol
The morality (m) is given by the formula:
m = `"n"/"mass of solvent"_((kg))`
On substituting the values in the above equation:
Molality = `(0.5 mol xx 1000 kg)/500` = 1 m
APPEARS IN
RELATED QUESTIONS
Calculate the amount of carbon dioxide that could be produced when 2 moles of carbon are burnt in 16 g of dioxygen.
Explain the term molality
Solve the following problem:
Write the following number in ordinary decimal form:
3.75 × 10−1
Solve the following problem:
Write the following number in ordinary decimal form:
14.3 × 10−2
Solve the following problem:
Write the following number in ordinary decimal form:
0.00477 × 105
Solve the following problem:
Perform the following calculation. Round off your answer to two digits.
`((4xx10^-3)(9.9xx10^-7))/((789)(1.002xx10^-10)(0.3xx10^2))`
Perform each of the following calculations. Round off your answers to three digits.
(3.26104) (1.54106)
Solve the following problem:
Perform the following calculation. Round off your answer to three digits.
`(8.94xx10^6)/(4.35xx10^4)`
Name the process associated with the following
A drop of ink placed on the surface of water contained in a glass spreads throughout the water.
What are the favourable qualities given to gold when it is alloyed with copper or silver for the purpose of making ornaments?
If the concentration of glucose \[\ce{(C6H12O6)}\] in blood is 0.9 g L–1, what will be the molarity of glucose in blood?
Sulphuric acid reacts with sodium hydroxide as follows:
\[\ce{H2SO4 + 2NaOH -> Na2SO4 + 2H2O}\]
When 1 L of 0.1 M sulphuric acid solution is allowed to react with 1 L of 0.1 M sodium hydroxide solution, the amount of sodium sulphate formed and its molarity in the solution obtained is:
(i) 0.1 mol L–1
(ii) 7.10 g
(iii) 0.025 mol L–1
(iv) 3.55 g
Which of the following terms are unitless?
(i) Molality
(ii) Molarity
(iii) Mole fraction
(iv) Mass percent
If 4 g of \[\ce{NaOH}\] dissolves in 36 g of \[\ce{H2O}\], calculate the mole fraction of each component in the solution. Also, determine the molarity of solution (specific gravity of solution is 1g mL–1).
The molarity of pure water is ______.
What quantity (in mL) of a 45% acid solution of a monoprotic strong acid must be mixed with a 20% solution of the same acid to produce 800 mL of a 29.875% acid solution?
Find the molality of solution if boiling point increases by 1.75 K and molal elevation constant of solvent is 5K kg mol-1.
