Chemical Bonding
Acids and Bases
Kinetics/Equilibrium
Oxidation-Reduction
Other
100
Which compound contains ionic bonds? A) NO B) NO2 C) CaO D) CO2
C) CaO. it has a metal and nonmetal atoms and the metal attracts the nonmetal ions. They have oppositely charged ions.
100
When dissolved in water, an Arrhenius base yields A) hydrogen ions B) hydronium ions C) hydroxide ions D) oxide ions
C) Hydroxide ions. OH- ions are base
100
As the number of effective collisions between the reactant particles in a chemical reaction decreases, the rate of the reactions 1) decrease 2) increase 3) remains the same
1) decrease. It is a direct relationship.
100
Which polyatomic ion has a charge of 3–? A) chromate ion B) oxalate ion C) phosphate ion D) thiocyanate ion
C) phosphate ion. Look at Reference table E
100
Which term identifies the most probable location of an electron in the wave-mechanical model of the atom? (l) anode (3) nucleus (2) orbital (4) cathode
(2) orbital. Electrons are found in orbitals
200
Based on your Reference Tables, the atoms of which of these elements have the strongest attraction for electrons in a chemical bond? A) N B) Na C) P D) Pt
A) N. According to table S or the periodic table in your reference table, N is the most electronegative out of all these choices.
200
When the hydronium ion concentration of a solution is increased by a factor of 10, the pH value of the solution A) decreases 1 pH unit B) decreases 10 pH units C) increases 1 pH unit D) increases 10 pH units
A) decreases 1 pH units. when you increase concentration of acid you are decreasing the pH value. 1 pH is a factor of 10
200
For a given chemical reaction, the addition of a catalyst provides a different reaction pathway that A) decreases the reaction rate and has a higher activation energy B) decreases the reaction rate and has a lower activation energy C) increases the reaction rate and has a higher activation energy D) increases the reaction rate and has a lower activation energy
D) increases the reaction rate and has a lower activation energy. Catalyst lowers the activation energy and gives a faster rate of reaction.
200
An oxidation-reduction reaction involves the A) sharing of electrons B) sharing of protons C) transfer of electrons D) transfer of protons
C) transfer of electrons. You either gain or lose electrons in an oxidation-reduction reaction.
200
What is the charge of the nucleus of a copper atom ? (1) +1 (3) +29 (2) +2 (4) +64
(3) +29. Cu has 29 protons (atomic Number)
300
Which substance contains nonpolar covalent bonds? A) H2 B) H2O C) Ca(OH)2 D) CaO
A) H2. H2 have the same electronegativity which makes nonpolar bonds.
300
Which solution reacts with LiOH(aq) to produce a salt and water? A) KCl(aq) B) CaO(aq) C) NaOH(aq) D) H2SO4(aq)
D) H2S04. H2SO4 is a strong acid and LiOH is a strong base which neutralizes and produces a salt and water.
300
Given the equation representing a reaction at equilibrium: N2(g) + 3H2(g) <-> 2NH3(g) What occurs when the concentration of H2(g) is increased? A) The equilibrium shifts to the left, and the concentration of N2(g) decreases. B) The equilibrium shifts to the left, and the concentration of N2(g) increases. C) The equilibrium shifts to the right, and the concentration of N2(g) decreases. D) The equilibrium shifts to the right, and the concentration of N2(g) increases
C) The equilibrium shifts to the right, and the concentration of N2(g) decreases. When you increasing H2, the reaction goes to the right(->) in order to reduce the stress caused by H2. H2 and N2 is used up which forms more NH3.
300
Which metal will spontaneously react with Zn2+(aq), but will not spontaneously react with Mg2+(aq)? A) Mn(s) B) Cu(s) C) Ni(s) D) Ba(s)
A) Mn(s). In reference table J Mn is below Zn and above Mg.
300
Which sample of matter represents a mixture? (1) aqueous ammonia (3) liquid mercury (2) gaseous ethane (4) solid iodine
(1) aqueous ammonia. aqueous is in water
400
Which properties do naturally occurring metal compounds generally possess? A) high stability and low solubility in water B) high stability and high solubility in water C) low stability and low solubility in water D) low stability and high solubility in water
A) high stability and low solubility in water. Metals are solids; they are not able to dissolve in water. There is no movement in the particles which makes it more stable.
400
According to the alternate acid-base theory , an chloride ion, acts as a base when it combines with 1) OH ion. 3) H- ion 2) K+ ion. 4) H+ ion
4) H+ ion. H+ ion is an acid and the chloride ion accepts the H+ ion. According the alternate acid-base theory the ACID DONATES the PROTON and the BASE ACCEPTS the PROTON.
400
Based on Reference Table J, which two reactants react spontaneously? A) Mg(s) + ZnCl2(aq) B) Cu(s) + FeSO4(aq) C) Pb(s) + ZnCl2(aq) D) Co(s) + NaCl(aq)
A) Mg(s) + ZnCl2(aq). Mg is more spontaneous and Zn is below Mg which will react.
400
Iron corrodes according to the equation 4 Fe + 3 O2 → 2 Fe2O3 This redox process occurs because 1) iron loses electrons and is oxidized 2) oxygen loses electrons and is reduced 3) iron gains electrons and is reduced 4) oxygen gains electrons and is oxidized
1) iron loses electrons and is oxidized. iron is a metal which loses electrons and oxidation loses electron (LEO GER)
400
Which formula represents an alkane? (1) C2H2 (3) C3H4 (2) C2H4 (4) C3H8
(4) C3H8. Reference Table Q
500
A solid substance is an excellent conductor of electricity. The chemical bonds in this substance are most likely (1) ionic, because the valence electrons are shared between atoms (2) ionic, because the valence electrons are mobile (3) metallic, because the valence electrons are stationary (4) metallic, because the valence electrons are mobile
(4) metallic, because the valence electrons are mobile. Electricity is conducted through moving valence electrons for metallic bonds.
500
What is the net ionic equation for a neutralization reactions? 1) H+ H2O -> H3O. 3) 2H + 2O -> 2OH 2) H + NH3-> NH4. 4) H + OH-> H2O
4) H + OH -> H2O. In a neutralization reaction water is produced after the reaction.
500
Ammonia is produced commercially by the Haber reaction: N2(g) + 3 H2(g)<->2NH3(g) + heat The formation of ammonia is favored by A. an increase in pressure C. removal of N2(g) B. a decrease in pressure D. removal of H2(g)
A. an increase in pressure. when you increase pressure the reaction goes to the right because the left side has 4 moles and the right side has 2 moles and it goes to the smaller number of moles.
500
Base your answer to the following question on the reaction below 2 Cr(s) + 3 Cu2+(aq) ->2 Cr3+(aq) + 3 Cu(s) The electronic equation that represents the oxidation reaction that occurs is A) 2Cr^0– 6e– -> 2Cr^3+ B) 2Cr^0+ 6e– ->2Cr^3+ C) 2Cr^3+– 6e– ->2Cr^0 D) 2Cr^3++ 6e– -> 2Cr^0
A) 2Cr^0– 6e– ->2Cr3+. Oxidation you are losing electrons (LEO GER)
500
How many joules of heat are absorbed to raise the temperature of 435 grams of water at 1 atm from 25°C to its boiling point, 100.°C? (1) 4.5 X 10^4 J (2) 1.4 x 10^5 J (3) 2.5 x 10^7 J (4) 7.4 x 10^7 J
(2) 1.4 x 10^5 J. Q=mHv m=435g Hv=2260 J/g Q=(435g)(2260 J/g) Q=2,500,000J / 2.5*10^7
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