A chemist has 10 litre of a solution that is 10% sulphuric acid by volume. He wants to dilute the solution to 4% strength by adding water how many litre of water must be added?
15 liters
total volume is 10l, acid volume is 10lx10%=1l, volume of water to be added- xl, new strength is 4%=0.04 1/(10+x)=0.04 x=15 liters of water to be added
5 litres of HCL is added to 15 litre of a solution containing 40% of DI water. What is the percentage of DI water in the new mixture?
What is the market value of a 8.5% stock, in which an income of Rs. 341 derived by investing Rs. 3900, brokerage being 3/4%?
