grade 12 Chemistry review | Baamboozle - Baamboozle

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Using the following thermochemical data: 2Y(s) + 6HF(g) → 2YF3(s) + 3H2(g) ΔH° = –1811.0 kJ/mol 2Y(s) + 6HCl(g) → 2YCl3(s) + 3H2(g) ΔH° = –1446.2 kJ/mol calculate ΔH° for the following reaction: YF3(s) + 3HCl(g) → YCl3(s) + 3HF(g)

182.4 kJ/mol

When an electron falls to a lower energy level it:

Emits light

For the reaction: 2HI (g) <--> H2 (g) + I2 (g). If the Ksp is 0.020 and the Qsp is 0.34, the reaction will proceed which direction?:

Proceed to the left

name an isomer of 2-methylpropane

butane

Identify the following atom from the electron configurations. Y : 1s22s22p63s23p64s23d104p65s24d105p1

Indium

If you have a negative entropy and a positive enthalpy, what can the Gibb's free energy be?

only positive

If n=2, what is l and ml respectively?

l = 0, 1; ml= -1, 0, +1

. Calculate E°cell for the following reaction: 2Fe2+ (aq) + Cd2+ (aq) à 2Fe3+ (aq) + Cd(s)

-1.17V

State the condensed electron configuration of b. S^2- (sulfur anion)

[Ne]3s^2 3p^6

What is the major product when 2-methylprop-1-ene is treated with HBr at room temperature?

2-bromo-2-methylpropane

Which of the following would you expect to have the highest boiling point? ethanol, ethyl ethanoate, ethanoic acid, ethane, ethene, ethyne, ethanal or chloroethane?

fluoroethane

ethanol

ethanal

ethanoic acid

The oxidation number of N in (NH4)3PO4 (ammonium phosphate) is:

-3

What is the hybridization of a carbon in ethene?

sp2

The air pollutant NO is produced in automobile engines from the high temperature reaction: N2 (g) + O2 (g) D 2NO(g) Keq = 1.7 x 10-3 at 2300K. If the initial concentration of N2 (g) and O2 (g) at 2300K are both 1.40M, what is the concent

1.372 mol/L

For nitrous acid, HNO2, Ka = 4.0 × 10–4. Calculate the pH of 0.54 M HNO2.

1.83

What is the correct electronic configuration of Copper?

[Ar]4s13d10

What is the name of this compound?

2-bromo-1,3-dimethylbenzene

What is the specific heat capacity of zinc if it requires 146 J to raise the temperature of 15 grams of zinc by 25°C?

0.39 J/g°C

Calculate the [H+] in a solution that is 0.18 M in NaF and 0.25 M in HF. (Ka = 7.2 × 10–4)

1.0 × 10–3 M

How can you convert but-2-yne to (2Z)-but-2-ene

specifically a Lindlar hydrogenation (converts to cis configuration)

Is cyclopentanol a primary secondary or tertiary alcohol?

secondary alcohol ( 2 carbons attached to the adjacent carbon of alcohol)

Which of the following is NOT a strong base? 1. Be(OH)2 c. NaOH 2. Li2O d. CaO

Be(OH)2

The pH at the equivalence point of a titration of a weak acid with a strong base will approximately be

greater than 7.00

Cyclopropane undergoes rearrangement to form propene, C3H6. If cyclopropane disappears at a rate of 0.50 mol/ Ls, at what rate is propene being pduced?ro

rate of appearance = +0.50 mol/Ls

How many carbons are there in 3-ethylpentane?

7

Calculate the [H+] in a solution that has a pH of 9.48.

3.3 × 10–10 M

What is the pH of a solution made of 0.50 M acetic acid and 0.200 sodium acetate given the Ka of acetic acid is 1.8 x 10-5?

4.34

In the following chemical reaction the oxidizing agent is 1. 5H2O2 + 2MnO4 – + 6H+ → 2Mn2+ + 8H2O + 5O2

MnO4 –

What is the VSEPR shape of AsH3

trigonal pyramidal (AX3E)

How many carbons are there in methyl butanoate

5

For the reaction: Ag+ (aq) + Cl-(aq) <--> AgCl(s) ΔH = -127kJ/mol In which direction does the equilibrium shift as a result of adding NaCl?

to the right

left

no change

Identify the reducing agent in the following chemical reaction. Cd + NiO2 + 2H2O → Cd(OH)2 + Ni(OH)2

Cd

Which one of the following is a redox reaction?

H+ (aq) + OH– (aq) → H2O(l)

2Al(s) + 3H2SO4 (aq) → Al2 (SO4 )3 (aq) + 3H2 (g)

CaBr2 (aq) + H2SO4 (aq) → CaSO4 (s) + 2HBr(g)

2KBr(aq) + Pb(NO3 )2 (aq) → 2KNO3 (aq) + PbBr2 (s)

What VSEPR molecular shape do you expect for IF4 +?

octahedral

tetrahedral

seesaw

square planar

Identify the following atom or ion from the electron configurations. Y - : 1s22s22p63s23p64s23d104p65s24d105p6

Iodine anion

Given the equilibrium: AgBr(s) <--> Ag+ (aq) + Br-(aq) Ksp = 3.3 x 10-13 If [Br-(aq)] = 0.50 mol/L, what is [Ag+ (aq)]?

6.6 x 10^-13

The oxidation number of Fe in K3Fe(CN)6 is:

+3