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Home Q & A Board Science-Related Homework Help Chemistry (Moderator: Laser_3)
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firework6 firework6
wrote...
12 years ago
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?
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wrote...
#1
12 years ago
[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)
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