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Define Buffers and Buffer Solutions?
Solutions containing both weak acid and their salts or solutions containing weak hydroxides and their salts are referred to as buffer solutions. They have the capacity of resisting changes in pH when either acid or alkali is added to them. Buffers are therefore, aqueous solutions that tend to resist any pH change when small amounts of acid or base are added. A buffer system consists of a weak acid (proton donor) and its conjugate base (proton acceptor) or a weak base and its conjugate acid in comparable concentrations. Because they maintain a constant pH, buffers are good reference solutions.
Explain Lyme disease The disease - About 70-80% of patients infected by B. burgdorferi develop the characteristic skin lesion, erythema migrans, which occurs at the site of the
Which one of the following is an example of a tree having simple leaf ? 1. Neem 2. Rose 3. Mimosa pudica 4, Peepal.
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Mice (Mus musculus) have 40 chromosomes per diploid cell (2n=40). How many double- stranded DNA molecules, and how many chromosomes are there in a mouse cell that is in the G2 stag
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In earthworms, when the ovaries mature, the clitellum secretes a viscous substance in the form of a girdle. This girdle hardens in to a cocoon around the clitellum. The ova are dis
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