Pure water freezes at 0C and boils at 100C. Would tap water likely freez and boil at those exact temperatures?
Why or why not? please......help me
and next question is..
People often sprinkle salt on icy driveways and sidewalks. Would a substance like flour have a similar effect on the ice? explain....
2006-11-27 08:26:27 · 3 answers · asked by hey 3 in Science & Mathematics ➔ Chemistry
Tap water contains inpurities, so it will impact both of the temperatures... but since it is MOSTLY pure, meaning the amount of inpurities are very small, it is almost negligible. I just mention this as you said "EXACTLY"...
Keep in mind though, 0C and 100C assumes EXACTLY 1 atmosphere of air pressure, which we never have....
2006-11-27 08:35:42 · answer #1 · answered by tkquestion 7 · 0⤊ 0⤋
Tap water freezes at about the same as pure water. It does not have enough ions in it to change the freezing point. Boiling too.
Salt on ice dissociates into ions . It is a large amount of ions. It does lower the freezing point. Flour not only would not dissolve it would not ionize. No effect. The more particles the more effect. CaCl2 makes 3 ions so it does more than NaCl with 2.
2006-11-27 16:35:29 · answer #2 · answered by science teacher 7 · 0⤊ 0⤋
to answere the 2nd one, NO
salt is something that raises the temp to melt the ice, but at the same time, alters the chemicals to lower the freezing point on the ice, so it will take a temp even colder for the ice to re-freeze
the first part
most likly it will b/c the tap water and pure water is the same chemical equation and properties
2006-11-27 16:35:03 · answer #3 · answered by Kiefer Toni 2 · 1⤊ 0⤋