Which of the following substances would you expect to dissolve in water?
a) NaCl
b) CH3OH
c) H3COCH3
d) C (graphite)
e) CH3CH3
2007-03-05 03:14:38 · 9 answers · asked by Foxychick 1 in Science & Mathematics ➔ Chemistry
A and B are both very soluble in water.
2007-03-05 03:27:52 · answer #1 · answered by Dr Dave P 7 · 0⤊ 1⤋
Salt dissolves because all ionic compounds containing sodium are water soluble. Methanol dissolves because it is a polar compound, and in many ways structurally similar to water. Dimethyl ether is less soluble than methanol, but due to its molecular shape and high electronegativity of the oxygen atom, is polar and can form hydrogen bonds with water. Graphite is made up of nonpolar bonds, and subsequently will not dissolve. Ethane is also non polar due to its symmetrical shape, and is not water soluble.
2007-03-05 03:54:08 · answer #2 · answered by chemcook 4 · 0⤊ 0⤋
A & to an extent C, A is certain as it is the only one which is ionically bonded and polar, the rest are essentailly non-polar. Hydrocarbons do not tend to be water soluble. Does coal dissolve in water.. umm no.. so carbon doesn't either.
CH3OH is miscible, which means it mixes, but does NOT dissolve. Dimethyl ether [H3COCH3] is immiscible and doesn't dissolve fully unless treated in gas form. Ethane is not water soluble.
2007-03-05 03:25:20 · answer #3 · answered by Anonymous · 0⤊ 1⤋
All chlorides are soluble in water. Methyl alcohol is soluble as well. The ethyl ether is soluble as well because of the polar nature of the either oxygen. The graphite is not soluble, and the ethane is not soluble.
2007-03-05 03:25:33 · answer #4 · answered by richard Alvarado 4 · 1⤊ 0⤋
the real question is, at which temperature ?
e) is a gas so it will dissolve in small amounts at low temps.
ethane = 4.70 g/100 mL at 20°C
but is NOT soluble.
a) and b) are soluble, chloride salts are always soluble in water and Methanol is completely miscible in water.
d) graphite is soluble in supercritical water. not soluble at room temp.
c) is also a gas at room temp, dimethyl ether is considered soluble in water in all proportions.
2007-03-05 04:05:33 · answer #5 · answered by scientific_boy3434 5 · 0⤊ 0⤋
NaCl, it does a neat trick where if you take a glass of water and add the salt, the water molecules, being polar, will orient themselves based on the charge of the dissociated sodium and chloride ions. This reverse of entropy requires energy, so you will feel the glass get cooler.
2007-03-05 03:27:51 · answer #6 · answered by herogoggles 3 · 0⤊ 0⤋
Both NaCl, an ionic compound, and c) ethanol, should be soluble in water. Ethanol is capable of hydrogen bonding.
2016-03-29 00:50:09 · answer #7 · answered by Anonymous · 0⤊ 0⤋
a and b are both readily soluble in water. c is also soluble.
2007-03-05 03:29:43 · answer #8 · answered by Anonymous · 0⤊ 1⤋
a
2007-03-05 03:17:28 · answer #9 · answered by dirkjohn69 4 · 1⤊ 0⤋