CaCl2+Na2SO4---> CaSO4+ 2NaCl
A. Decomposition reaction
B. Double Replacement reaction
C. combustion reaction
D. Combination or Synthesis reaction
E. Single replacement reaction
To determine the type of reaction for the given chemical equation, we need to analyze the reactants and products.
The chemical equation shows the reaction between CaCl2 and Na2SO4, resulting in the formation of CaSO4 and 2NaCl.
In a decomposition reaction (A), a compound breaks down into simpler substances. However, in the given equation, we have two compounds as reactants combining to form two other compounds, so it is not a decomposition reaction.
In a double replacement reaction (B), the cations and anions of two different compounds swap partners to form new compounds. Looking at the given equation, we see that the positive ions (Ca and Na) and the negative ions (Cl and SO4) have switched places, resulting in the formation of two new compounds, CaSO4 and 2NaCl. Therefore, it is a double replacement reaction.
A combustion reaction (C) involves the reaction between a fuel (usually a hydrocarbon) and an oxidant (usually oxygen) to produce carbon dioxide and water. The given equation does not involve any hydrocarbon or involve oxygen as the oxidant, so it is not a combustion reaction.
In a combination or synthesis reaction (D), two or more substances combine to form a new compound. In the given equation, we do see a combination of reactants to form products, but it is a double replacement reaction as discussed earlier.
In a single replacement reaction (E), one element replaces another element within a compound. However, no single element is replacing another in the given equation, so it is not a single replacement reaction.
Therefore, the correct answer is B. Double Replacement reaction.