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Limewater is a saturated solution of calcium hydroxide (Ca(OH)2) in water. It is a compound made up of calcium, oxygen, and hydrogen atoms. Lime water turns milky when carbon dioxide is passed through it, due to the formation of calcium carbonate.
lime water is used to make sugar out of sugar beets x
You use limewater to test for the presence of carbon dioxide by bubbling it into the limewater. A positive is indicated by the limewater turning milky.
It is used as a test for carbon dioxide. It will turn chalky/ cloudy if carbon dioxide interacts with it.
PB is an element. It is the chemical symbol for lead.
Ag is the chemical symbol for silver, which is an element. It is not a compound.
Hl is an element. It is the chemical symbol for the element helium on the periodic table.
A single displacement reaction is a type of chemical reaction where a free element replaces another element in a compound. This occurs when a more reactive element displaces a less reactive element in a compound, forming a new compound and releasing the displaced element.
Gold is a pure element, not a compound, so it is homoatomic.