May 2024
Determine solution type
aqueous
You have 100mL of 0.5m Koolaid solution
calc # mol Koolaid powder needed
.100*0.5 =0.05
Write mole ratio (MR) using BCE
MR=2 mol c2 18/25 mol O2.18 H2o= 16 CO2
Contrast the Limiting Reactant(LR) and Excess Reactant(ER)
Determining which reactant LR allows
When calculating pressure conversions how do you know when to see 2 or 3 eraction
when you have a conversion you have to use
Calculate [oH^-1] in an aqueous solution with pOH=13.26 [oH^-1]=10-pOH
5.495*10^-14
why is rain water slightly acidic
presence of carbon dioxide in the air
Explain what occurs when oil is place in water
They quickly settle into layer again
Balance The UBCE
C4 H10(g) + O2(g) > Co2(g)+H2O(g)
C 2 C 2
H 13 H 13
O 10 O 10
when calulating pressure converisons which units can you cancel cross out
you have to cross out the bottom and the top
Calculate [oH-1] in a solution with pOH=4.67
[oH-1]=10^-4.67=.00002138=21*10^-5
Explain what causes acid precipitation
Human activities natural events
Describe what happens to oil and vinegar dressing after it's shaken
They come together then separate
Culculate the # mol Rb3Po4 needed
(6.43mol Rbcl/1) (1/3 mol Rbcl) produce 6.43 mol Rbcl
Determine 3 proporties on edible spoon must have to be a useful eating tool
you bite down on the spoon
which solution represents a strong base
Fe(oH)-and Fe^+3
During chemical equilibrium, what is the same, and what Is different
Fwd Rxn and Rev Rxn ccur at same rate
Compare #mol CuO available cs needed to determine LR and ER
2NH3(g) + CuO(g) > N2(g) + 3Cus(g) +3H2O(g)
Balance___HNO3(aq) + ___Ba(OH)2(aq) > __Ba (NO3)2(aq) + ___H20(1)
2HN03(aq) + Ba(OH)2(aq) > Ba(NO3)2(aq) + 2H2O(1)
Identing 3 properities a spoon must have for it to be useful as an eating too
Eat, scoop, and hand
Calculate the pOH of a 4.2*10^-7 mOH^+1 aqueous solution at 25oC
[H^+1]<[oH^-1]- 10g(4.2*10^-7m)
Which Reaction is favored in? # 1 rxn?
[N204]<[N02]
Calculate the molarity of a solution consisting of 2.5 g Lif dissolved in 5.63 L of water
(2.5gLif/1) (1molLif/25.94glif)= 0.09637mol lif
__C2h6(g) + ___O2 (g) > ___H2O (g) + __ CO2 (g)
How do particles move in a solid liquid and gas
Solid don't move, liquid flows, gas floats