20. To the reaction between calcium carbonate and hydrochloric acid,CaCO_3(s)+2HCl(aq)- →CaCl2(aq) +CO2(g)+H2O(1)The volume of CO2 produced is measured against time. Excessive CaCO3 powder is reacted with 20.0 mL of 2.0 mol dm-3 HCl solution under 25 ℃. The graph of V(CO2)ag...
Rabbits with the body weight of(2. 0 卤 0. 5) kg were chosen,to study the effects of sustained-release calcium hydroxide and sustained-release hydrochloric acid on nutrient digestion and absorption of rabbits. The results showed that sustained-release calcium hydroxide promoted digestion and ...
Calcium carbonate, calcium hydroxide and calcium oxide can be used to neutralise the acid in soil.Plan an investigation to find out which of these calcium compounds neutralises acid most effectively.You are provided with the three calcium compounds, dilute hydrochloric acid and common laboratory appar...
Calcium chloride, CaC12, is colorless deliquescent solid that is soluble in water and ethanol. It is formed from the reaction of calcium carbonate and hydrochloric acid or calcium hydroxide and ammonium chloride. It is used in medicine, as an antifreeze, and as a coagulant. 2.7 Color/Form Wh...
Rabbits with the body weight of(2. 0 ± 0. 5) kg were chosen,to study the effects of sustained-release calcium hydroxide and sustained-release hydrochloric acid on nutrient digestion and absorption of rabbits. The results showed that sustained-release calcium hydroxide promoted digestion and absorp...
46. When powdered calcium carbonate reacts with dilute hydrochloric acid, the carbon dioxide gas is produced. If the complete reaction of calcium carbonate with dilute hydrochloric acid produces a maximum volume of 30cm3of carbon dioxide gas in 100 seconds, what is the average rate of this react...
Chemical Properties Calcium chloride, CaC12, is colorless deliquescent solid that is soluble in water and ethanol. It is formed from the reaction of calcium carbonate and hydrochloric acid or calcium hydroxide and ammonium chloride. It is used in medicine, as an antifreeze, and as a coagulant....
About 1.2 g sample is accurately weighed, added 0.1 mol/L hydrochloric acid, boiled 10min, or until the fatty layer is clear, if necessary, adding water to maintain the original volume. Cooled and filtered, the filtrate and flask was washed thoroughly with water until last washing liquor is...
10 Dilute hydrochloric acid reacts with calcium carbonate to produce carbon dioxide.(a) (i) With the aid of a diagram, design and describe an experiment in a laboratory to show how the rate of reaction between these two substances depends on the particle size of calcium carbonate.[4](ii)...
Once you consume B12, the hydrochloric acid in your stomach releases the B12 from the protein. B12 then combines with a substance called intrinsic factor to be absorbed by the intestines. How much do I need to consume? There is insufficient information to establish an RDA for vitamin B12 for...