【Daily Question】Principles of Chemical Engineering 567: Litmus solution turns blue (May 27)

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This post was last edited by Zaihui Kangqiao on 2017-5-27 08:14. The Chemical Engineering Theory section is launching a \"One Question per Day\" campaign starting today, aimed at helping everyone reinforce their basic knowledge in chemical engineering. Subsequent campaigns will cover topics such as \"Chemical Engineering Principles,\" \"Mass Transfer and Separation,\" \"Chemical Engineering Thermodynamics,\" and \"Chemical Process Engineering.\" We hope for your active support~~~ Replies to the \"One Question per Day\" campaign can be viewed directly at **; the thread will be closed after 1 day! ! To encourage everyone’s continued participation this year! Participation earns 3 wealth points, with an additional 4 wealth points for correct answers~~~ Short answer question: What is the solution that turns red litmus test solution blue and phenolphthalein indicator red? hydroxide