The pH of rainwater collected from two cities P and Q was formed to be 5 and 6 respectively.
If 100 mL of rainwater of city P is diluted to 1000 mL by adding distilled water, will its pH increases or decrease?

The pH of rainwater collected from two cition P and Q was formed to be 5 and 6 respectively. Water of which city is more acidic?

There are two factories located one at place P and the other at place Q. From these locations, a certain commodity is to be delivered to each of the three depots situated at A, B and C. The weekly requirements of the depots are respectively 5,5 and 4 units of the commodity while the production capacity of the factories at P and Q are respectively 8 and 6 units. The cost of transportation per unit is given below : How many units should be transported from each factory to each depot in order that the transportable cost is minimum. When will be the minimum transportation cost?

Two schools P and Q want to award their selected students on the values of Discipline. Politeness and Punctuality. The school P wants to award Rs x each, Rs y each and Rs z each for the three respective values to its 3,2, and 1 students with a total award money of Rs 1000. School Q wants to spend Rs 1500 to award its 4, 1 and 3 students on the respective values (by giving the same award money for the three values as by school P). If the total amount of award for one prize on each value is Rs. 600. using matrices, find the award money for each value. Apart from above three values, suggest one value of awards.

At 90^(@) C, pure water has [H^(+)]=10^(-6) M.If 100 mL of 0.2 M HCl is added to 200 mL of 0.1 M KOH at 90^(@) C then pH of the resulting solution will be :

How many gm of solid KOH must be added to 100 mL of a buffer solution to make the pH of solution 6.0, if it is 0.1 M each w.r.t. acid HA and salt K A. [Given : pK_(a)(HA)=5]

6.2g of a sample containing Na_2CO_3, NaHCO_3 and non-volatile inert impurity on gentle heating loses 5% of its mass due to reaction 2NaHCO_3 rarr Na_2 CO_3 + H_2 O + CO_2 . Residue is dissolved in water and formed 100mL solution and its 10mL portion requires 7.5 mL of 0.2M aqueous solution of BaCI_2 for complete precipitation of carbonates. Determine mass (in gram) of Na_2 CO_3 in the original sample.