【Daily Question】9.28 Reply +2； For +3~8
Thread Content
This post was last edited by zjp on 2015-9-30 08:45. In order to increase the popularity of the chemical analysis section, the previous 【Weekly Topic】 activity has been replaced with a 【Daily Question】 activity; this helps to foster an active atmosphere for technical exchanges while also providing members with financial rewards. 【Daily Question】 (Single-choice question) Which of the following solutions needs to be stored away from light? A. Potassium hydroxide ； B、 Potassium iodide ； C. Potassium chloride ； D. Potassium sulfate. Post your answer as a reply; participating in the quiz earns you +2 wealth points. Getting all answers correct adds another +3 to +8 wealth points. Those who provide thorough analysis and explanations for the questions or answers (or include detailed calculation processes) will receive additional wealth rewards. If your answer is correct and your analysis and explanation are accurate, it will be marked as the best reply (or the best assistance). Feel free to answer the questions. Note: We will close this post after 24 hours, and at that time we will announce the best reply (the best assistance), as well as the answer and explanation.
B...........................
The solution that needs to be stored away from light is (D)
B、Potassium iodide————————————————–
The solution that needs to be stored away from light is (B)
The solution that needs to be stored away from light is (B, Potassium Iodide). A: Potassium Hydroxide； B、 Potassium iodide ； C. Potassium chloride ； D. Potassium sulfate.
B、 Potassium iodide； . . . . . . . . . . . . . . . .
The solution that needs to be stored away from light is (B): white cubic crystals or powder. Since potassium iodide appears as white cubic crystals or powder, it has a slight tendency to absorb moisture in humid air; over time, free iodine is released, causing it to turn yellow, and trace amounts of iodate can be formed. Light and moisture can accelerate decomposition.