You analyze an aliquot of a water sample for alkalinity and find that the volume

Question

You analyze an aliquot of a water sample for alkalinity and find that the volumes of titrants consumed are: P =5 mL and T=12 mL. These results allow you to make the following conclusions about the concentrations of the specimen. (One is true)

a.12 mL of the titrant are equivalent to [HCO3-]

b.5 mL of the titrant are equivalent to [HCO3-] and 12 mL are equivalent to [CO3-2]

c.2 mL of the titrant are equivalent to [HCO3-] and 10 mL are equivalent to [CO3-2]

d.-2 mL of the titrant are equivalent to [OH-] and 7 mL are equivalent to [CO3-2]

Explanation / Answer

b.5 mL of the titrant are equivalent to [HCO3-] and 12 mL are equivalent to [CO3-2]

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