Solutions

A solution has 0.001 mole/L zinc ions with pH = 6. The solubility product of zinc hydroxide is Ignoring activity corrections, find the ratio (rounded to two decimals) of the reaction quotient to the solubility product.

The ratio of the moles of CO evolved to the moles of O consumed in respiration, also called the respiratory quotient (RQ), is calculated for a carbohydrate (C H O ) as substrate and found to be 1. Under similar conditions, for a fatty acid (C H O ) as substrate, the respiratory quotient is ________________ (rounded off to two decimal places).

River water containing two types of spherical suspended particles (clay particles, metal particles) is retained in a sedimentation tank. The clay particles having diameter of 75 m and specific gravity of 2.65 is settling in the tank with a constant velocity. The velocity of clay particles is 2 times that of metal particles having specific gravity of 8. Assume discrete settling and laminar flow conditions within the sedimentation tank. The estimated diameter of the metal particles is ________________________ (in m, rounded off to integer).

A saturated stock solution is existing at 25°C. In one experiment (i) 25 g is added to the stock solution. In another experiment (ii) 25 g is added to the stock solution. Select the correct statement from the following.

The pH of a solution containing 0.1M of acetic acid and 0.05 M of sodium acetate is ________ (rounded off to 2 decimal places).
The value of ionization of acetic acid is 4.76.

The ionic strength of a solution containing 0.01M of and 0.001M of is _____ M (rounded off to 3 decimal places)