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6.2. Rate of reaction
A subsection of Chemistry, 5070, through 6. Chemical reactions
Listing 10 of 90 questions
The apparatus shows a method of following the rate of the reaction between magnesium carbonate, MgCO3, and dilute nitric acid, HNO3. MgCO3+ 2HNO3 Mg(NO3)2+ H2O+ CO2flask magnesium carbonate and dilute nitric acid The graph shows the volume of gas collected against time. volume of gas collected / cm3 time / minutes Three statements are made about the experiment. The mass of the flask and its contents decreases as time increases. The rate of the reaction decreases as time increases. The reaction has finished after four minutes. Which statements are correct?
5070_w21_qp_12
MCQ
2021
Paper 1, Variant 2
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Two methods used by students to measure the rate of a reaction are the ‘disappearing cross’ method and the ‘loss of mass’ method. ● For the ‘disappearing cross’ method, the student measures the time taken for the reaction mixture to go cloudy. ● For the ‘loss of mass’ method, the student measures the loss of mass over a known time interval. The rates of two reactions are investigated. reaction 1 Warm aqueous silver nitrate is added to chlorobutane dissolved in ethanol. Two products are formed. One is an organic compound which is soluble in ethanol and the other is silver chloride which is insoluble in ethanol. reaction 2 Pieces of solid calcium carbonate are added to dilute hydrochloric acid. Which method should be used for each reaction?
5070_w23_qp_12
MCQ
2023
Paper 1, Variant 2
View
Questions Discovered
90