Glencoe Science (level blue) chapter 17 test practice:
Describe the reaction using the names. Discuss which bonds are broken and how atoms are rearranged to form new bonds.
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The equation provided in the problem is incorrect. The chemical formula of calcium carbonate is `CaCO_3` , not `CaCO_2` . `SiO_3` also does not exist in isolation and is a negatively charged cation that can only exist with a positive anion.
The correct equation is: `CaCO_3+SiO_2=CaSiO_3+CO_2` . This is a single displacement reaction.
`CaCO_3` is the chemical formula for calcium carbonate. The anion in this compound is `Ca^(2+)` and the cation is `CO3^(2-)` . `SiO_2` is silicon dioxide.
In the reaction as `SiO_2` reacts with `CaCO_3` , in the compound `CaCO_3` , the `CO_2` is replaced by `SiO_2` . The `CaCO_3` molecule is broken to form `CaO + CO_2` . Then the `CaO` combines with `SiO_2` to form `CaSiO_3` .
As a result CO_2 is set free.
CaCO2+SiO3=CaSiO3+CO2 is a single replacement reaction. If you look closer into the problem you can see that the cation (negatively charges part aka `CO3^-` and `SiO2^-` ) switch places to replace each other. The CO2 seperated and the SiO3 formed a bond with the anion (positively charged) Ca
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