During an activity in science class, a student is given an unidentified white solid. She measures some properties of the solid and lists the properties in the table
below.
|
|
Melting point
|
Soluble in water?
|
Color
|
|
Unidentified solid
|
734ºC
|
yes
|
white
|
Then the teacher gives her the following table that lists the properties for two solids.
|
Name of solid (Chemical formula)
|
Melting point
|
Soluble in water?
|
Color
|
|
Lead Nitrate (Pb(NO3)2)
|
270ºC
|
yes
|
white
|
|
Potassium Bromide (KBr)
|
734ºC
|
yes
|
white
|
Could the student’s unidentified solid be either lead nitrate or potassium bromide?
- The unidentified solid could be lead nitrate but not potassium bromide.
- The unidentified solid could be potassium bromide but not lead nitrate.
- The unidentified solid could either be potassium bromide or lead nitrate.
- The unidentified solid could NOT be either potassium bromide or lead nitrate.
