Question

explain double decomposition reaction with example

Answer 1

in double decomposition the first positively charged elements shift their negatively charged elements

ex. HCl + NaOH = NaCl + H2O




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Answer 2

When two compunds react to form two new compunds, a double replacement reaction occurs.
MgCO3 + 2HCl ------> MgCl2 + H2CO3