Calculate the pH and [C6H5O73-] ion in a 0.10 M solution of citric acid. Ka1 = 7.4 x 10-4, Ka2 = 1.7 x 10-5 and Ka3 = 4 x 10-7. The formula for citric acid is H3C6H5O7. It has 3 ionizable protons.

he would use the colour black

so here we go

atomic mass

239 + 1 = y + 134 + 3 combine like terms

240 = y + 137             subtract 137 from both terms

240 - 137 = y

103 = y

atomic number

94 = z +54 + 0

94 = z + 54               subtract 54 from both sides.

40 = z

answer

answer:

the answer is 6 valence electrons.

explanation:

valence is the # of electrons on the outer most shell of an atom.

oxygen has 6.

although, the valency of oxygen is 2, because it only needs to make 2 covalent bonds, or gain 2 electrons, to achieve the stable octet configuration of a noble gas.

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~ trueboss72

the answer is option a.