a. Name and give the formulae of substances A to E. b. Write balanced chemical equations for
Question:
a. Name and give the formulae of substances A to E.
b. Write balanced chemical equations for the reactions in which compounds B, C and E were formed.
c. Where would you expect to find acid A?
d. Universal indicator solution was added to solution C. What colour did it go?
e. Upon addition of dilute hydrochloric acid to solution C, a neutralisation reaction took place.
(i) Write a balanced chemical equation for the reaction taking place.
(ii) Name the salt produced in this reaction.
dissolves in water Carbon dioxide Acid A bubbled through calcium hydroxide solution + burning magnesium White precipitate D White solid B + carbon further bubbling of carbon dioxide + water Colourless solution E Alkaline solution C
Step by Step Answer:
a b A HCO3 C MgOH2 E CaHCO32 for B CO g Mg s for C ...View the full answer
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The experiment aims to show the impact of various beverages on teeth by using eggs as a representation of enamel. Three eggs are boiled and then placed in glasses filled with fizzy drinks, vinegar, and mango juice for 24 hours. The shells of eggs are similar to enamel as they are composed of calcium carbonate, and enamel is primarily made of calcium phosphate. The eggs are then observed to demonstrate the effects of the different liquids on teeth and the importance of brushing regularly. The egg placed in fizzy drink has turned dark in color but can be cleaned by brushing with toothpaste and rinsing with water. The egg placed in vinegar has had its shell softened due to the chemical reaction of vinegar and calcium carbonate, which can\'t be reversed. This highlights the fact that acids are more damaging to teeth than other substances. The egg placed in mango juice represents the process of bacteria in the mouth converting sugars and starches into acids that form plaque, which can be prevented by brushing. The use of fluoride in toothpaste is also highlighted as it slows down the demineralization process and protects the enamel. The importance of brushing teeth twice a day is emphasized.
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