The task in science lab: discover which solid substance, without tasting, is sugar. donna and dave have five substances to test, and unfortunately, two are white! "let's heat them! " suggested donna. did donna have a reasonable solution to their problem? a) yes, it would narrow the search to salt or sugar. b) no, all four substances have pretty low melting points. c) no, it's impossible to reach these temperatures in a student lab. d) yes, sugar's melting point is much lower than the other four solids.

D. Yes, sugar's melting point is much lower...

Yes, sugar's melting point is much lower than the other four solids. They were probably able to rule out ice immediately because it would melt at room temperature. That leaves the other solids. They could identify sugar and salt by color and then heat both, seeing which one melts first. That would be sugar.

nacl or sodium chloride is an ionic compound. this is because an ionic compound pertains to a compound that consists of positively and negatively charged ions. in this case, na (sodium) has a tendency to lose one electron when it reacts with with other atoms, so the resulting sodium ion contains 11 protons and 10 electrons, thus making it positively charged (na+), when chlorine reacts, it usually gains one electron to form an ion called chloride, thus making it negatively charged ( since the ions are oppositely charged, they attract.