Chemistry
A solution contains 15 g of sodium chloride in 285 g of water. Calculate the concentration of the solution.
Related Questions
Explain why:
(a) Boiled or distilled water tastes flat.
(b) Ice at zero degree centigrade has greater cooling effect than water at 0°C.
(c) Burns caused by steam are more severe than burns caused by boiling water.
(d) Rivers and lakes do not freeze easily?
(e) Air dissolved in water contains a higher proportion of oxygen.
(f) If distilled water is kept in a sealed bottle for a long time, it leaves etchings on the surface of the glass.
(g) Rain water does not leave behind concentric rings when boiled.
To make a saturated solution, 136 g of a salt is dissolved in 500 g of water at 293 K. Find its solubility at this temperature.
4 litres of an organic compound, acetone, is present in 90 litres of an aqueous solution. Calculate its volume percent.
The following table gives the solubility of different salts at different temperatures.
Temperature (in K) Substance dissolved (in g) KNO3 NaCl KCl NH4Cl 283 21 36 35 24 293 32 36 35 37 313 62 36 40 41 333 106 37 46 55 353 167 37 54 66 Answer the following questions based on the table given above.
(a) What mass of KNO3 would be needed to produce a saturated solution of KNO3 in 50 grams of water at 313 K.
(b) If a saturated solution of KCl is made at 353 K and then cooled at room temperature, what would you observe? Explain.
(c) Find the solubility of each salt at 293 K.
(d) Which salt has the lowest solubility at 283 K?
(e) What is the effect of change of temperature on the solubility of a salt.