Substances that dissolve in water

Answer 1

substances that dissolve in water include, sugar, salt and others.

Answer 2

Good question! This is Biology. Two substances i know for sure dissolve in water are salt and sugar.

Water and salt both consist of what we call polar covalent bonds. This means electrons in the molecule are not equally shared between the atoms of the molecule, causing a partial charge on the molecule's atoms.

Water, for instance, contains two hydrogen atoms and one oxygen atom. The oxygen atom has a stronger pull on the electrons being shared, hence giving it a slightly negative charge.

Since electrons are negatively charged, the oxygen part of the molecule is partially negatively charged and the hydrogen parts of the atom are partially positively charged.

In salt, which is made of sodium and chlorine, the shared electrons spend almost all of their time on the chlorine side, making the chlorine negatively charged, and very little time on the sodium side, making the sodium positively charged. Just like the oxygen atom, the chlorine atom has a stronger pull on the shared electrons.

When salt is put into water, the positively charged side of water molecules surround the negatively charged chlorine, and the negatively charged side of the water molecules surrounds the positively charged sodium. ( you know the saying "opposites attract") This breaks the sodium chloride bond and the salt is dissolved.

hope this helps =] I'm only in 10th grade and we are currently learning this