【Daily Question】June 21: What does temporary hardness of water refer to?
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This post was last edited by 3FCCtaofeng on 2015-6-21 at 16:01. Daily question for the activity (single-choice question): The temporary hardness of water refers to the content of calcium and magnesium ( ) in water. A. Sulfates B. Nitrates C. Chlorides D. Carbonates Answer: D, Carbonates. Please participate actively to win prizes. +5 points for correct answers, +2 points for participation. One time per person only. Close this topic in two days.
D. Bicarbonate – it seems to be repeated. http://bbs.hcbbs.com/thread-1409139-1-1.html
D. Carbonate – there’s an extra character; just remove the hydrogen!
The temporary hardness of water refers to the ( C ) content of calcium and magnesium in the water.
The temporary hardness of water refers to the content of (D) of calcium and magnesium in the water.
Temporary hardness of water refers to the content of calcium and magnesium (carbonates) in the water.
The temporary hardness of water refers to the ( ) content of calcium and magnesium in the water. D. Carbonates
The temporary hardness of water refers to the ( D ) content of calcium and magnesium in the water. A. Sulfates B. *ao acids C. Chlorides D. Carbonates
The temporary hardness of water refers to the ( D ) content of calcium and magnesium in the water.