The Lenntech Quiz - ProProfs Quiz
Testing your knowledge about water treatment. 4 Questions | By Loic | Last updated: May 24, 2025 | Total Attempts: 43
1. Water as delivered by NAWASA is no longer safe for drinking because of several contaminants from the water source present in the environment. It is now therefore imperative that water to be safe for drinking has to undergo water purification in several stages. Because of several contaminants, water undergoes several stages.
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CA Water Treatment Chapter 5 - ProProfs Quiz
Liquid alum delivered to a water treatment plant contains 485 milligrams of alum per milliliter of liquid solution with specific gravity of 1.325. Jar testes indicate that the best alum dose is 9 mg/L.
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- What is the composition of polyacrylamide gels?
- The composition of polyacrylamide gels is generally expressed in terms of T (the total acrylamide and Bis monomer concentration in g/100 ml) and C (the percentage of cross-linker in the total amount of acrylamide).
- How are polyacrylamide gels prepared?
- Polyacrylamide gels are prepared by free radical polymerization of acrylamide and a comonomer crosslinker such as bis-acrylamide. Polymerization is initiated by ammonium persulfate (APS) with tetramethylethylenediamine (TEMED) as the catalyst (see figure below).
- Are polyacrylamide gels hydrolyzed or ionic?
- Nonhydrolyzed, and hence nonionic, polyacrylamide gels are used for electrophoresis media in biotechnology laboratories [ 72, 73 ]. Particulate polyacrylamide gels are useful in horticulture [ 74 ]. Hydrolysis of polyacrylonitrile can yield first polyacrylamide and eventually some acrylic acid groups.
- How is ionic polyacrylamide prepared?
- Anionic polyacrylamide can also be prepared by the hydrolysis of nonionic polyacrylamide ( Fig. 34.7 ). The process generally involves the addition of a strong base to a homopolymer of polyacrylamide. This can be done in an aqueous solution, inverse emulsion. Recently, a process to produce dry forms of hydrolyzed polyacrylamide has been developed.
