Chemistry 1110 Lab Midterm

SI unit for length

meter (m)

SI unit for mass

kilogram (kg)

SI unit for temperature

Kelvin (K)

SI unit for time

second (s)

Amount of substance

mole (mol)

Kilo

10^3

Deci

10^-1

Centi

10^-2

Milli

10^-3

Micro

10^-6

Volume of a cylinder

πr²h

Volume of a cube

s^3 (s=length of 1 side)

What is water displacement used for?

To find volume of irregularly shaped solids.

Describe water displacement

One or more of the solids is placed in a graduated cylinder, the difference in the water level before and after the solids are added is equal to the volume of the solids.

Density equation

mass/volume

when to use scientific notation

# > 100 and # < 0.01

Copper part A: Rxn 1

Cu + 4 HNO3 >>> Cu(NO3)2 + 2 NO2 + 2 H2O

Copper part A: Rxn 1; formula of brown gas

NO2

Color of CO(II) nitrate solution

blue

Solubility of the copper(II) nitrate solution

water soluble

Copper part A Rxn 2

Cu(NO3)2 + 2 NaOH >>> Cu(OH)2 + 2 NaNO3

Copper part A Rxn 2; color and appearance of copper (II) hydroxide

blue and thick

Water solubility of copper (II) hydroxide

not water soluble

Copper part A rxn 3

Cu(OH)2 >>> CuO + H2O

Copper part A Rxn 3; color and solubility of copper (II) oxide

black, not soluble

Copper part B Rxn 4

CuO + H2SO4 >>> CuSO4 + H2O

Copper part B rxn 4; color and solubility of copper(II) sulfate

blue, yes- water soluble

Copper part B rxn 5

CuSO4 + Zn >>> Cu + ZnSO4

Zn + H2SO4 >>> ZnSO4+ H2

color of zinc metal (before rxn)

silver

color/appearance of copper metal (after rxn)

red/rust

copper part B rxn 5; color of solution before rxn

blue

copper part B rxn 5; color of solution after rxn

colorless

copper part B rxn 5; color of hydrogen gas

colorless

how to find percent recovery

percent recovery: (g Cu final/ g Cu initial) x 100%

NaCl

sodium chloride

CaBr2

calcium bromide

Al2O3

aluminum oxide

Mg3(PO4)2

magnesium phosphate

CO2

carbon dioxide

SO3

sulfur trioxide

PCl5

phosphorous pentachloride

N2O4

dinitrogen tetroxide

AsCl3

arsenic trichloride

Ionic compounds

compounds composed of cations and anions

molecular compound

composed of 2 or more non-metals

ionic or molecular: K3N

potassium nitride- ionic

ionic or molecular: CuCl2

copper (II) chloride- molecular

ionic or molecular: NO

nitrogen oxide- molecular

ionic or molecular: FeCl2

iron(II) chloride- ionic

ammonium iodide

NH4I

zinc(II) phosphate

Zn3(PO4)2

chromium (III) bromide

CrBr3

aluminum nitrate

Al(NO3)3

silver(I) fluoride

AgF

cadmium(II) sulfide

Cd(S)

Barium chloride hexahydrate

Ba(Cl2) * 6 H2O

7 lab safety rules and procedures

1. approved chemical SPLASH GOGGLES

2. chemicals must be disposed in specific safety container

3. close toed shoes

4. know the location of fire extinguishers and eye wash, shower stations

5. drinks and food not permitted

6. students not allowed in stock rooms

7. no cell phones

prefix- di

2

prefix- tetra

4

prefix- penta

5

prefix- hexa

6

prefix- hepta

7

prefix- octa

8