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Equilibrium

Question
CBSEENCH11006532
Wired Faculty App

Calculate the hydrogen ion concentration in the following biological fluids whose pH are given below:
(a) Human muscle-fluid, 6·83
(b) Human stomach fluid, 1·2
(c) Human blood, 7·38
(d) Human saliva, 6·4

Solution

We know
       space space space space space space space space space pH space equals space minus log space open square brackets straight H to the power of plus close square brackets or space space space space space log space open square brackets straight H to the power of plus close square brackets space equals space minus pH           straight a right parenthesis space For space human space muscle minus fluid comma space pH equals 6.83 because space log space left square bracket straight H to the power of plus right square bracket space equals space minus 6.83 minus 1 plus 1 minus 0.83 equals stack space 7 with minus on top.17 space space space therefore space left square bracket straight H to the power of plus right square bracket space equals antilog space left parenthesis stack space 7 with minus on top.17 right parenthesis equals space 1.479 space straight x space 10 to the power of negative 7 end exponent straight M straight b right parenthesis space For space human space sotmach space fluid space pH equals 1.2 because space log space left square bracket straight H to the power of plus right square bracket space equals negative 1.2 space equals negative 1 minus 1 plus 1 minus 0.2 space equals 2 with minus on top.8 therefore left square bracket straight H to the power of plus right square bracket equals space antilog space left parenthesis 2 with minus on top.8 right parenthesis equals 6.31 space straight x 10 to the power of negative 2 end exponent straight M straight c right parenthesis space For space human space blood comma space pH space equals 7.38 because space log left square bracket straight H to the power of plus right square bracket space equals negative 7.38 equals negative 7 minus 1 plus 1 minus 0.38 space space space space equals stack space 8 with minus on top.62 therefore left square bracket straight H to the power of plus right square bracket equals space antilog space left parenthesis stack space 8 with minus on top.62 right parenthesis equals 4.169 space straight x space 10 to the power of negative 8 end exponent space straight M straight d right parenthesis space Human space saliva comma space pH equals 6.4 because space log space left square bracket straight H to the power of plus right square bracket space equals negative 6.4 space equals negative 6 minus 1 plus 1 minus 0.4 space equals space 7 with minus on top.60 because space left square bracket straight H to the power of plus right square bracket space equals antilog space left square bracket 7 with minus on top.60 right square bracket equals 3.981 space straight x 10 to the power of negative 7 end exponent straight M

Some More Questions From Equilibrium Chapter

What kind of molecules in a liquid can evaporate?

Name the factors on which vapour pressure of any liquid depends.

Which measurable property becomes constant in water vapour equilibrium?

Give an example from daily life in which there is gas solution equilibrium?

A crystal of common salt of a given mass is kept in its aqueous solution. After 24 hours, its mass remains the same. Is the crystal in equilibrium with the solution?

What is the role of forward and backward reactions at equilibrium of a reversible reaction?

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