Textbook-Integrated Guide to Educational Resources

Enter your answer to ONE decimal place.
DO NOT use scientic notation.
DO NOT write in the units.

Calculate the pH of a {x}M sodium acetate solution.

What is the equilibrium constant for the following reaction under the same conditions?
C₂H₆(g) H₂(g) + C₂H₄(g) K = ?

COCl₂(g) CO(g) + Cl₂(g)

If you have 1.00 mole of COCl₂(g) in a 1.00L container initially, how many moles of COCl₂ will be present when the system reaches equilibrium?

You have 0.50 mol SbCl₅ present initially in a 1.0L flask. The system is allowed to reach equilibrium at 450^oC. There is 0.10 mol Cl₂ present at equilibrium. What is the equilibrium constant, K?

What is the calculated reaction quotient, Q? {2:NUMERICAL:=2.1e-1:1e-2#Correct! ~%50%2.1e-1:5e-2#Close but not quite right}

If K_c for this reaction at the temperature of the experiment is 3.7 x 10³, will the reaction move toward the left or toward the right? {1:MULTICHOICE:left#Sorry, that's wrong.~=right#Correct!}

Hint: Remember that the total pressure is the sum of all the partial pressures.

K_p for this reaction is {x} at {y}°C. Calculate K_c at this temperature. (R = 0.0821 L atm/mol K)

Note:
DO NOT use scientific notation
Use integers (no decimal places) even is this is not the correct number of significant figures.
DO NOT write in the units.
eg: 18

N₂(g)+ O₂(g) 2NO(g)

If you have 0.75 moles of N₂(g) and 0.75 moles of O₂(g) in a 2.0L container initially, how many moles of N₂ will be present when the system reaches equilibrium?

KOH(aq) + HBr(aq)

What are the reaction products? Does the reaction yield an acidic, basic, or neutral aqueous solution?

(Water molecules are not shown in the diagrams.)

Papain is a thiol protease isolated from papaya. The optimal pH for its enzymatic activity is 6.0-7.0. Which of the following buffering systems would work best for a laboratory experiment requiring active papain at pH 6.5? What molar ratios of the compounds would you use to prepare the solution?

Which of the following reactions will be product -favored?

A 25.0 mL aliquot of a 1.44M solution of ammonia (K_b = 1.8 x 10^-5) is titrated with 1.50M HCl. Use the Indicator Table below to decide which of the indicators listed would most accurately signal the equivalence point for this titration.

Write the letter corresponding to your choice of indicator in the box.

What products will result when HSO₄^- is added to water? Complete and balance the reaction below.

HSO₄^- + H₂O ?

CO(g) + H₂O(g) CO₂(g) + H₂(g) H⁰= -41.2 kJ

What will happen to the concentration of CO₂ if the temperature is increased?

C₃H₈(g) + 5O₂(g) 3CO₂(g) + 4H₂O(l)

CH₄(g) + Cl₂(g) CH₃Cl(g) + HCl(g)

Which of the following statements is true?

You have 0.4 moles C₂H₂ and 0.2 moles O₂ present initially in a 5L flask. You allow the reaction to run until it reaches equilibrium. Which of the following is the correct ICE table for this process?

Hint: This is asking for the ratio of rates which is proportional to the ratio of the rate constants, all else being equal.

SiO₂(s) + 2C(s)Si(S) + 2CO(g)

4PH₃ + 8O₂ P₄O₁₀ + 6H₂O

CaCO₃(s) + 2HCl(aq)CaCl₂(aq) + H₂O(l) + CO₂(g)

CaSO₄(aq) + H₂C₂O₄(aq) CaC₂O₄(s) + H₂SO₄(aq)

Specific heat capacity of copper = 0.383 J/(g*°C)

2C₂H₆(g) + 7O₂(g) 4CO₂(g) + 6 H₂O(g)

It costs $3 per package of 10 pairs of socks. How much does 2 pairs of socks cost?

The unbalanced reaction equation is given below:
C₄H₁₀(g) + O₂(g) CO₂(g) + H₂O(g)

2C₇H₆O₃(s) + C₄H₆O₃(l) 2C₉H₈O₄(s) + H₂O(l)

4Fe(s) + 3O₂(g)2Fe₂O₃(s)

If 14.6 mL of 0.10 M K₂Cr₂O₇ are needed to react completely with 28 g of blood, what is the blood alcohol level of the driver?

2S(s) + 3O₂(g) + 2H₂O(l)2H₂SO₄(l)

Data:

S(s) + O2(g) SO2(g)	Hrxn = -296.83 kJ
2SO3(g)O2(g) + 2SO2(g)	Hrxn = -198.2 kJ
SO3(g) + H2O(l)H2SO4(l)	Hrxn = -227.72 kJ

In an experiment a block of aluminum was heated to 100^oC and placed in 200 g of water at 25^oC. If the final temperature of the system is 43^oC, and no heat transfer to the surroundings occurred, what is the mass of the aluminum block?

P₄(s) + 5O₂(g) P₄O₁₀(s)

If 67.2 g of P₄ is burned,1620 kJ of energy is evolved. What is the molar enthalpy of combustion of P₄ if the process was carried out under constant pressure?