WebMar 30, 2024 · Explain the formation of scum when hard water is treated with soap.Answer:The hardness of water is due to thecalcium and magnesium saltspresent in it.When the soap molecule reacts with these salts, it leads to the formation of awhite precipitatewhich is insoluble in water and is known asscum. ... NCERT Question 10 - … WebHARDNESS IN DRINKING-WATER 2 Estimated daily intakes of magnesium from water of about 2.3 mg and 52.1 mg in soft-water and hard-water areas, respectively, have been …
9. Which Substance Is Used To Determine The Hardness Of Water …
WebNov 17, 2024 · Alkalinity is a measure of the acid-neutralizing capacity of water. It is an aggregate measure of the sum of all titratable bases in the sample. Alkalinity in most natural waters is due to the presence of … WebHardness is generally defined as the caco3 equivalent of ca and Mg ions present in water and expressed in mg/llitas caco3. Hardness can be determined by EDTA titrometric … intrinsic approach definition
Soft Water and Hard Water Temporary and Permanent Hardness of Water …
WebMay 4, 2024 · Check the CBSE Class 10 Science Revision Notes for Chapter 2 - Acids, Bases and Salts. ... It is used for removing permanent hardness of water. Plaster of Paris (Calcium Sulphate Hemihydrate, CaSO ... WebDescription:-In this lecture you will learn about Soft and Hard water, how hardness is caused in water, types of hardnesshard water soft water water softener... Web(c) After softening of hard water, essential minerals like calcium and magnesium are removed. Question 13. What is the role of buffer solution in measuring the hardness of water? Answer: A buffer solution maintains the pH between 9-10 and improves the quality of water hardness testing by insulating against changes in pH or temperature. Question … intrinsic aspirations