Name alkanes family from 20 - 50

Achemistry student weighs out of phosphoric acid , a triprotic acid, into a volumetric flask and dilutes to the mark with distilled water. he plans to titrate the acid with solution. calculate the volume of solution the student will need to add to reach the final equivalence point. round your answer to significant digits.

Is this a single replacement reaction or there is no

The climate of the continental united states is generally 1. tropical 2. temperate 3. arctic 4. highland