Advertisements
Advertisements
प्रश्न
Calculate the molarity of the following solution:
30 g of Co(NO3)2 . 6H2O in 4.3 L of solution.
Advertisements
उत्तर
Molar mass of Co(NO3)2 . 6H2O = 58.7 + 2(14 + 48) + 6 × 18 g mol−1
= 58.7 + 2(62) + 108 g mol−1
= 58.7 + 124 + 108 g mol−1
= 290.7 g mol−1
∴ Number of moles of Co(NO3)2 . 6H2O = `"Mass"/"Molar mass"`
= `(30 g)/(290.7 g "mol"^(-1))`
= 0.103 mol
Volume of solution = 4.3 L
Molarity of solution = `"Number of moles of solute"/"Volume of solution in L"`
= `(0.103 "mol")/(4.3 "L")`
= 0.024 M
APPEARS IN
संबंधित प्रश्न
Calculate (a) molality (b) molarity and (c) mole fraction of KI if the density of 20% (mass/mass) aqueous KI is 1.202 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?
Calculate the mass percentage of aspirin (C9H8O4) in acetonitrile (CH3CN) when 6.5 g of C9H8O4 is dissolved in 450 g of CH3CN.
22.22 gram of urea was dissolved in 300 grams of water. Calculate the number of moles of urea and molality of the urea solution.
(Given: Molar mass of urea = 60 gram mol−1)
What is molal depression constant? Does it depend on nature of the solute?
Molarity of liquid HCl will be if the density of the solution is 1.17 gm/cc.
The molarity of pure water is ____________.
2.5 litres of NaCl solution contain 5 moles of the solute. What is the molarity?
The volume of 4 N HCl and 10 N HCl required to make 1 litre of 6 N HCl are ____________.
If N/10 50 ml H2SO4, N/3 30 ml HNO3, N/2 10 ml HCl is mixed and solution is made to 1 L. Then normality of the resultant solution is:
A solution is prepared by dissolving 10 g NaOH in 1250 mL of a solvent of density 0.8 mL/g. The molality of the solution in mol kg–1 is:
Mole fraction of C3H5(OH)3 in a solution of 36 g of water and 46 g of glycerine is ______.
Out of molality (m), molarity (M), formality (F) and mole fraction (x), those which are independent of temperature are:
Define the following modes of expressing the concentration of a solution. Which of these modes are independent of temperature and why?
x (mole fraction)
The number of electrons involved in the reduction of one nitrate ion to hydrazine is
The de Broglie wavelength of a car of mass 1000 kg and velocity 36 km/hr is :
A solution has been prepared by dissolving 5 g of urea in 95 g of water. What is the mass percentage of urea in the solution?
Calculated the mole fraction of benzene in a solution containing 30% by mass of its is carbon tetrachloride
Calculate the molarity of the following solution:
30 mL of 0.5 M H2SO4 diluted to 500 mL.
