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Define some Precautions for Measurement of pH?
1. Never touch the membrane of the glass electrode with anything else except soft tissue paper since it is fragile and is easily ruined if scratched or bumped.
2. The electrodes must not be removed from the solution unless the selector switch is at zero.
3. Never dip the glass electrode in a solution with a dehydrating action.
4. For basic solutions with pH more than 11, glass electrodes of special composition are required to avoid interference due to sodium ion.
5. The glass electrode may be covered with a sleeve to save it from jerks.
Q. Explain the use of Benzoates acid? Benzoic acid, sodium benzoate and the parahydroxy esters (parabens) are used as preservatives. Benzoic acid and its sodium salt, sodium be
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Which two gases are exchanged when living organisms breathe? Oxygen and carbon dioxide are the gases exchanged when living organisms breathe.
Class of Mollusca - Monoplacophora Bilaterally symmetrical, with broad flat foot and single shell, mantle cavity has five to six pairs of gills; six pairs of nephridia of whi
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what is the warmest and coldest parts of the boy
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Explain Antigens ? A blood type, or group, is based upon the presence or absence of certain substances called antigens on the surface of the red blood cells. Antigens are subs
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