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Science-Related Homework Help Chemistry Topic started by: firework6 on Jan 5, 2012



Title: Please determine the type of reaction between sulphuric acid and tricalcium phosphate...?
Post by: firework6 on Jan 5, 2012
The reaction of sulphuric acid and tricalcium phosphate yields calcium dihydrogen phosphate and calcium phosphate. [2H2SO4 + Ca3(PO4)2 ---> Ca(H2PO4)2 + 2CaSO4] What is this reaction? (synthesis, decomposition, combustion, single displacement, double displacement or acid-base?)

Please can anybody state the answer and explanation?


Title: Please determine the type of reaction between sulphuric acid and tricalcium phosphate...?
Post by: buffet55 on Jan 5, 2012
[2H2SO4 + Ca3(PO4)2 ---> Ca(H2PO4)2 + 2CaSO4]

Is double displacement.

Meaning everything is shifted around, chemicals are mixed but you start with two and end with two, meaning everything has just rearranged to form new chemicals.

Single replacement would mean one was unchanged and one changed around like ac + b -> ab + c

whereas double replacement is more like ab+cd -> cb + ad (with single letters being the molecule being moved around)