Katy is doing a lab about chemical changes. Some of her recorded observations include: Mg metal – burned - bright light – produced white/gray powder. Zinc metal – dissolved in HCl. Sucrose – burned to black – distinct odor. Of the following choices, which best represents contrasting observations from Katy’s lab?
a.
Sucrose burned to black, Zinc metal dissolved in HCl
b.
Mg metal burned with bright light, Zinc metal dissolved in HCl
c.
Mg metal burned and produced white/gray powder, Sucrose burned to black

Question

Katy is doing a lab about chemical changes.  Some of her recorded observations include:  Mg metal – burned - bright light – produced white/gray powder.  Zinc metal – dissolved in HCl.   Sucrose – burned to black – distinct odor.   Of the following choices, which best represents contrasting observations from Katy’s lab?
a.
Sucrose burned to black, Zinc metal dissolved in HCl
b.
Mg metal burned with bright light, Zinc metal dissolved in HCl
c.
Mg metal burned and produced white/gray powder, Sucrose burned to black

anonymous · Answer

d.
Mg metal burned and produced white/gray powder, Mg metal burned with bright light