In determination of hardness by EDTA method, 50ml of standard hard water required 30ml of EDTA solution while 50ml of sample hard water consumed 20ml of EDTA solution. After boiling 50ml of same sample required 10ml of EDTA solution. Calculate the permanent hardness.(a) 322ppm(b) 332ppm(c) 664ppm(d) 644ppmThe question was asked in final exam.I would like to ask this question from Problems, Units and Formulae topic in chapter Water of Applied Chemistry

In determination of hardness by EDTA method, 50ml of standard hard wat

1.	In determination of hardness by EDTA method, 50ml of standard hard water required 30ml of EDTA solution while 50ml of sample hard water consumed 20ml of EDTA solution. After boiling 50ml of same sample required 10ml of EDTA solution. Calculate the permanent hardness.(a) 322ppm(b) 332ppm(c) 664ppm(d) 644ppmThe question was asked in final exam.I would like to ask this question from Problems, Units and Formulae topic in chapter Water of Applied Chemistry
Answer» Right option is (B) 332ppm For explanation: For 50ml of boiled water requires the 10ML of EDTA solution that is 10(50/30) MG of CaCO3. The 1000ml of the boiled water requires the 10(50/30)*20=322mg of CaCO3. It MEANS permanent hardness is 322ppm.

Discussion

No Comment Found

Related InterviewSolutions

The central pollution control board and the department of ocean and environment has established __________ stations over the entire coastal line of the country.(a) 171(b) 172(c) 173(d) 174I have been asked this question in a national level competition.Query is from Monitoring and Control of Water Pollution topic in portion Water of Applied Chemistry
Pollution enters into the water system in ___________ ways.(a) 1(b) 2(c) 3(d) 4The question was posed to me in homework.Asked question is from Monitoring and Control of Water Pollution in section Water of Applied Chemistry
What is the full form of GAP?(a) Ganga action pre distribution(b) Ganga action plan(c) Ganga affected plan(d) Ganga affected pre distributionThe question was posed to me in examination.My enquiry is from Monitoring and Control of Water Pollution topic in portion Water of Applied Chemistry
The unpleasant odour of the water is due to presence of the __________(a) Nitrogen(b) Bismuth(c) Phenols(d) Dissolved oxygenThe question was posed to me by my college professor while I was bunking the class.This intriguing question originated from Biological Oxidation Process topic in section Water of Applied Chemistry
Periodic cleaning is used to _________(a) Increase efficiency(b) Decrease efficiency(c) Increase pressure(d) Decrease dissolved oxygenThe question was asked by my college professor while I was bunking the class.This question is from Biological Oxidation Process in chapter Water of Applied Chemistry
Domestic water treatment is carried out under __________ conditions.(a) Aerobic(b) Anaerobic(c) Cannot be known(d) Depends on the pollution level of waterI got this question during a job interview.I'm obligated to ask this question of Methods of Reducing Water Pollution in chapter Water of Applied Chemistry
The mineral free water is not used in __________(a) Pharmaceuticals(b) Cosmetics(c) Explosives(d) DrinkingThe question was asked in an online interview.I want to ask this question from Ion Exchange Process in division Water of Applied Chemistry
Ion exchange process is the clean process because it has ___________(a) Sludge formation(b) No sludge formation(c) Little sludge is formed(d) Other precipitates are formedI had been asked this question during an online exam.The query is from Ion Exchange Process topic in portion Water of Applied Chemistry
__________ should be free of turbidity as they interfering in exchange process.(a) Raw water(b) Hard water(c) Very hard water(d) Soft waterThis question was addressed to me during an interview.This interesting question is from Permutit’s Process topic in section Water of Applied Chemistry
The hardness of the water in the zeolite process can be treated at the range of __________(a) 5-10ppm(b) 5-15ppm(c) 5-20ppm(d) 5-25ppmThis question was posed to me in homework.Question is from Permutit’s Process topic in division Water of Applied Chemistry

Discussion

No Comment Found

Related InterviewSolutions

Reply to Comment