Exam I
Gas or vapor becomes a liquid __________ the boiling point
at or below
An exothermic reaction will tend to have a _______ K than an endothermic reaction as temperatures increase.
What is lower?
The presence of less oxygens (ex. HClO4 vs. HClO3) in acids, tend to make them ______.
What is weaker?
More oxygens mean that the negative charge in that conjugate base is more stable. More stable conjugate base = stronger acid.
The oxidation number for each element in PO4-3
What is -2 for oxygen and +5 for phosphorous
This piece of equipment is necessary in making molar dilutions
Volumetric flask
CaO(s)+O2(g)↔CaO3(s)
Increasing the temperature causes the overall pressure of the reaction drops. This reaction could be classified as.
What is endothermic
Aluminum hydride (AlH3) + Sodium Hydride (NaH) gives you Na+ + (H-AlH3)-
Identify the Lewis base in the reaction
What is NaH?
Hydride is a negatively charged hydrogen atom.
Zn(s) + CuSO4(aq) --> Cu(s) + ZnSO4(aq)
This is the reducing agent.
What is metallic zinc
The dissociation factor if Mg3(PO4)2
5
A reaction begins as a purple solution. Reactants are pink and the products are blue. As we increase the pressure, there was a noticeable color change to blue. Knowing this, the _____ has the least amount of moles in the reaction.
What are products
A solution containing an indicator at various pH's, is colored as follows:
pH 5: Yellow
pH 6: Yellow
pH 7: Green
pH 8: Blue
pH 9: Blue
The pKa of the indicator is this.
What is 7?
The following reaction occurs in this cell.
Zn(s) --> Zn2+(aq) + e-
What is the anode?
The description of a solution that has 100 grams of KNO3 dissolved in 150mL of water ( the solubility of KNO3 is 90g/100mL)
Unsaturated
(Can still be dissolved)
Br2(g)↔2Br(g)
I increase pressure and the reaction turns red. I increase temperature and the solution turns clear.
a) Rxn is endothermic, Y=red
b) Rxn is exothermic, Y=red
c) Rxn is endothermic, X=red
d) Rxn is exothermic, X=red
What is C
The pH for pure water at 35 degrees Celsius is 6.8
The pH is ______
Neutral
Which species undergoes reduction?
2Al + Fe2O3 --> Al2O3 + 2Fe
What is Fe3+?
The concentration of hydroxide ions in a solution made by dissolving 2.50g of calcium hydroxide in 200mL of water.
0.337 g/mol
A+heat→2B+C
In this combustion reaction, decreasing heat will cause the reaction to do this.
What is move slower in the forward direction, LCP doesn't apply, the reaction isn't reversible
Given these acids and their Ka values, which sequence lists the corresponding anions in order of increasing base strength?
HC2H3O2 Ka = 1.8 x 10-5
HCN Ka = 6.2 x 10-10
HF Ka = 7.2 x 10-4
F-, CN-, C2H3O2-
Who is the best SI ever?
Yuh boi;)