Trivia Quiz On Chemical Reactions!

For the following questions (10+11) Ascorbic acid ( H2A ) is adiprotic acid with two ionization equilibria  H2A <—> H+ + HA-       Ka1= 8* (10^-5) HA- <—-> H+ + A^-2.       Ka2 = 1.6 * (10^-12)

Consider the following reaction: The reaction is known to be second order with k 0.80 L/mol s. If you start with a concentration of 0.086 molVL of NOBr, what will be its concentration after 22 seconds?

• A.

  2.0 x 10^-9 mol/L

• B.

  5.4 x 10^-2 mol/L

• C.

  3.4 x 10^-2 mol/L

• D.

  8.7x 10^-1  mol/L

 Which of the following possesses the greatest concentration of hydroxide ion?

• A.

  A solution with a pH of 3.0

• B.

  91 X 10-4 M solution of HNO3

• C.

  A solution with a pOH of 12.0

• D.

  Water

Calculate the K5 for an unknown HF given that a solution of 0.10 M HF has a pH oIIl.9?

• A.

  7.9x10^6

• B.

  6.31x10^2

• C.

  6.2x10^-18

• D.

  1.6x10^-17

The pOH of a solution that contains 1.94x10^-10 M H3O+ at 25 °C is

• A.

  1.94 

• B.

  4.29

• C.

  7.00

• D.

  9.71

In terms of the "Collision Theory of Chemical Kinetics", the rate of a chemical reaction is proportional to:

• A.

  The change in free energy per second.

• B.

  The change in temperature per second.

• C.

  The number of collisions per second.

• D.

  The number of product molecules.

A 0.14 M HNO2 solution is 5.7% ionized calculate the H+ ion concentration

• A.

  8* (10^-3) M

• B.

  0.057 M

• C.

  0.13 M

• D.

  0.14 M

Hich of tge following cant act as lewis base ?

• A.

  Cl-

• B.

  NH3

• C.

  Cr+3

• D.

  CN-

The frequency factor and energy of a reaction are 8.7 * (10^12) S-1 and 36 KJ mol-1 the rate constand of a reaction at 25 C is 

• A.

  7.2 * (10^-2)

• B.

  1.8 * (10^-2)

• C.

  5.4 * (10^-3

• D.

  3*(10^3)

What is the half life for a reaction assuming first order kinetics if 75% of a reaction decomposesi in 60 minutes 

• A.

  21 min

• B.

  15 min

• C.

  90 min

• D.

  30 min

Calculate the Ph in a 0.10 MH2A solution 

• A.

  0.10

• B.

  11.45

• C.

  4.0

• D.

  2.55

What is the concentration of A-ion in a 0.10M H2O

• A.

  8 * (10^-5)

• B.

  7.5*(10^-5)

• C.

  1.6*(10^-12)

• D.

  0.10

Which of the following statements is true for a fast reaction 

• A.

  The values of the rate constant and the half-life are both large

• B.

  The values of the rate constant and the half-life are both Small

• C.

  The values of the rate constant is small and the half-life is large

• D.

  The values of the rate constant is large and the half-life is small

Which of the following rafe lows is consistent with these data 

• A.

  Rate = k {Na}

• B.

  Rate = k {Na} {Cl2}^2

• C.

  Rate =k{Na} {Cl2}

• D.

  Rate = k{Na}^2 Cl2

What is the overall order of the reaction of No with cl2

• A.

  1

• B.

  1.5

• C.

  3

• D.

  22

What is the value of the rate constant for the reaction of No with Cl2

• A.

  2.38

• B.

  3.35

• C.

  4.76

• D.

  9.52

A solution containing 100g unknown liquid and 900g water has a freezing point of -3.33C  given Kf= 1.86 C/m for water , the molar mass of the unknown liquid is

• A.

  69.0

• B.

  333

• C.

  619

• D.

  161

• E.

  62.1

Which of the following 0.1 M solutions would have a Ph of 7 ?

• A.

  NaOCl

• B.

  Kcl

• C.

  NH4 l

• D.

  Ca(OAC)2

• E.

  None of these

Type question here

• A.

  Increases{H+} when placed in H2O

• B.

  Decreases{H+} when placed in H2O

• C.

  Increases{OH-} when placed in H2O

• D.

  Act as a proton acceptor in any system

• E.

  Act as a proton donor in any system

The conjugate base of OH- is

• A.

  O2

• B.

  O-

• C.

  H2O

• D.

  O-2

What is the concentration of hydroxide ions in a solution with Ph=4.282?

• A.

  4.282 M

• B.

  9.718 M

• C.

  1.92 * (10^-10)

• D.

  5.22* (10^-5)

• E.

  1.66* (10^4) M

When solution A 0.1 M NaCl are separated by semi permeable membrane what occurs during osmosis 

• A.

  Slovent molecules move from B into A

• B.

  Na+ + Cl- ions move from B into A

• C.

  The molarity of A increases

• D.

  No changes id observed

Calculate the concentration of a solution formed when15.0 ml of 600 M HCl are diluted with 25 ml of water

• A.

  0.150

• B.

  0.240 M

• C.

  2.25 M

• D.

  3.60 M

The correct order for decreasing atomic radius of the 5 atoms Cs ,Ba , Cl , Br, I is 

• A.

  I>Br>cl>Cs>Ba

• B.

  Ba>Cs>I>Br>Cl

• C.

  Cs>Ba>I>Br>Cl

• D.

  Ba>Cs>l>Br>Cl

What is the density of CCl4 molar mass 154 g/mol vapor at 714 torr and 125 C

• A.

  4.43 g/L

• B.

  0.226 g/l

• C.

  0.443 g/l

• D.

  2.26 g/L

Determine the freezing point of a 0.25 m solution of glucose in water ( kf for water is 1.86 c/m )

• A.

  0.93 C

• B.

  -0.93 C

• C.

  0.46 C

• D.

  -0.46 C

Which of the following is not an SI base unit 

• A.

  Kg

• B.

  Meter

• C.

  Degree celsius

• D.

  Mole

The formular for the ionic compound of Ca+2 and N-3 is

• A.

  CaN

• B.

  Ca2N3

• C.

  Ca3N2

• D.

  Ca3N

How many grams dons 4.00 moles of H2O weigh?

• A.

  4.00 g

• B.

  4.50 g

• C.

  18.0 g

• D.

  72.0 g