PLEASE HELP FAST! WORTH 13 POINTS! A student was titrating a 18.00 mL sample of HCl with Ca(OH)2. To reach the endpoint of the titration and neutralize all of the HCl, the student added 49.62 mL of 0.150 M Ca(OH)2. What was the concentration of hydrochloric acid?

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explanation:

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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.

that's it!

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