2022年5月2日進行的AP化學考試已經結束。今天帶著大家一起看一道AP化學選擇題真題及答案解析!這道題取自于AP chemistry course and exam description。
Questions 13–15 refer to the information below.
A 0.50 g sample of Mg(s) was placed in a solution of HCl(aq), where it reacted completely.
題目:
In another experiment, a small piece of Mg(s) is weighed, then placed in a flask containing excess 1 M HCl(aq). The student wants to determine number of moles of gas produced. Which of the following is the best way to conduct the experiment for accurate data collection?
(A) Conducting the experiment at different temperatures to see which generates the most gas
(B) Completing the entire reaction in a large Erlenmeyer flask of known volume to measure the volume of the gas collected
(C) Collecting the gas in a eudiometer tube and measuring the volume of the gas collected
(D) Conducting the reaction in a graduated cylinder and measuring the volume of the gas collected