CH-1095
Preparing salts
Chemistry · Secondary 4 · Hard · Preparing salts
A student adds excess calcium carbonate powder to 50.0 cm³ of dilute nitric acid in a beaker. After effervescence stops, the mixture is filtered and the filtrate collected. Which statement explains why excess calcium carbonate is used?
- To ensure all the nitric acid is completely reacted and can be removed as solid residue.
- To ensure all the nitric acid is completely reacted so the filtrate contains only calcium nitrate solution.
- To increase the rate of reaction by raising the concentration of nitric acid.
- To prevent any calcium nitrate from dissolving in the filtrate.
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