Other Chemistry Answers

I am doing triprotic acid titrations.

I have an imaginary acid (H3A) 10mL with the concentration 0.760M and we are titrating a NaOH with the concentration of 0.320M.

I have to find the amount of NaOH in mol and mL for

1. first half-equivalence point

2.first equivalence point

3. second-half equivalence point

4.second equivalence point

5. third half-equivalence point and

6. third equivalence point.


and then I have to find the pH for each of these points.

List the characteristics of an ideal pesticide.

Briefly explain the methods which are used for reducing waste water quantity.

High concentrations of ammonia (NH3), nitrite ion and nitrate ion in water can kill fish. Lethal concentration of these species for rainbow trout are 1.1 mg/L, 0.40 mg/L, and 1361 mg/L, respectively. Express these concentrations in molality units, assuming a solution density of 1.00 g/mL.

Write the principle involved in chemiluminescence and spectrometry for air pollutant determination. Also state the pollutants which can be analysed using these methods.​

1.10g of ice at 273K is added to 20 g of water at 90oC in an insulated flask. The heat of fusion of ice is 6 Kj/mol and the specific heat capacity of water is 4.2 J/K/g. ignoring the heat capacity of the flask;

Determine the final temperature of the system (3 marks)

Dtermine ∆S of the system (3 marks)

Differentiate between the following: (5)

i) Particulate and Gaseous pollutants

ii) Dry adiabatic lapse rate and environment lapse rate

What do you understand by ozone layer depletion? Enlist various effects of ozone

layer depletion.

How do water vapours and carbon dioxide contribute to the phenomenon of global

warming?