One question per day; those who answer correctly receive 6 wealth points, while participants receive 2 wealth points； Question 264
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This post was last edited by YongBu※YanQi on July 28, 2015, at 09:58. Fill-in-the-blank question: When analyzing the purity of hydrogen chloride, if the _______ solution inside the absorption tube turns _______, it indicates the presence of free chlorine; the darker the color, the higher the content of free chlorine. Answer: Potassium iodide starch, blue
When analyzing the purity of hydrogen chloride, if the solution in the absorption tube turns _blue__, it indicates the presence of free chlorine; the darker the color, the higher the concentration of free chlorine.
When analyzing the purity of hydrogen chloride, if the __starch-iodide__ solution in the absorption tube turns __blue__, it indicates the presence of free chlorine; the darker the color, the higher the concentration of free chlorine.
When analyzing the purity of hydrogen chloride, if the solution in the absorption tube (starch-iodide) turns blue, it indicates the presence of free chlorine; the darker the color, the higher the concentration of free chlorine.
Answer: Blue;......................
When analyzing the purity of hydrogen chloride, if the hydrogen chloride solution in the absorption tube turns blue, it indicates the presence of free chlorine; the darker the color, the higher the concentration of free chlorine.
When analyzing the purity of hydrogen chloride, if the solution in the absorption tube turns __blue_, it indicates the presence of free chlorine; the darker the color, the higher the concentration of free chlorine.