CHEMLAB MIDTERM

what is the x and y axis on density graph

mass is x, volume is y, and slope is 1/density

what is a reason the experiment density is lower than the actual density

the volume was higher than it should've been due to air bubbles

what is a reason the experiment density is higher than the actual density

volume was lower then it should've been due to water splashing out

what if there is a big difference between actual and experimental density

it could be a calculation error because you didn't divide 1/density

what was the filtrate in experiment 2

NaCl

what was the residue in experiment 2

sand and chalk

what was the first step to separating salt from the chalk and sand

make the salt dissolve in water and then use evaporation to separate salt from water

how did you separate the sand and chalk

added HCl to dissolve the chalk, then decant the sand and chalk

which of sand and chalk is soluble

sand is insoluble and chalk is soluble

why did we add KCl

to change the acid back to CaCO3

how was the chalk then separated

it was vacuumed and filtered

What are the effects of CaCO3 being sparingly soluble in water

some of it would've dissolved with the salt in the water and the mass for salt at the end wouldve been bigger than in the beginning and chalk wouldve been smaller. Sand would not have been influenced

what metals are mainly seen with color

transition metals

what do you see if the d orbital is full

solution is colorless

what do you see if the d orbital is partially full

solution has color

what are the labels for axis for experiment 3

absorbance on y, wavelength on x

the peak absorbance color is...

the one we do not see

complementary color to lowest point

being absorbed

2 bonds is

sp

3 bonds is

sp2

4 bonds is

sp3

5 bonds is

sp3d

6 bonds is

sp3d2

ionic compounds are what kind of reaction

non metal and metal

covalent (molecule) compounds are what kind of reaction

non metal and non metal

soluble

strong electrolytes

insoluble

weak electrolytes

strong bases and acids are what kind of electrolytes

weak and soluble in water