Question

QUESTION 33 Write the balanced net ionic equation for the complete reaction of phosphoric acid and calcium hydroxide. What is the Sum of the coefficients? (Do not forget coefficients of one.) O 10 O • 19 QUESTION 34 Which of the following "generic reactions is an example of metathesis? ABCD - ADCB A+BAB OA.BC -- ACB AB-A Click Save and submit to see and submit Click Save All Answers to well as Save A wers

question 33

Answer 1

33)

The balanced equation is -

$2H_{3}PO_{4}\, (aq)+3Ca(OH)_{2}\, (aq)\rightarrow Ca_{3}(PO_{4})_{2}\, (s)+6H_{2}O\, (l)$

This total reaction finally produces net ionic equation . That is -

$6H^{+}(aq)+2PO_{4}^{3-}(aq)+3Ca^{2+}(aq)+6OH^{-}(aq)\rightarrow Ca_{3}(PO_{4})_{2}(s)+6H_{2}O(l)$

The sum of co-efficient are - (2+3+1+6)=12 (option b)