For Bromocresol Green, which of the following reactions (if any) would it be appropriate to use your indicator to determine the endpoint for the reaction?  Circle YES or NO for each reaction.  3 pts

• Hydrochloric acid and citric acid    YES or NO
• Hydrochloric acid and sodium hydroxide     YES or NO
• Acetic acid and ammonia    YES or NO

1. The tetraborate ion present in a 5.00 mL sample of a saturated borax solution is titrated with 4.78 mL of 0.209 M HCl. Express all calculations with the correct units and number of significant figures.

a. How many moles of B₄O₅(OH)₄^2- are present in the sample?

b. What is the molar concentration of B₄O₅(OH)₄^2- in the sample?

c. What is the K_sp of the dissolution of borax at this temperature?

Arrange the following molecules in order of increasing average molecular speed.

NO2 at 327K, He at 443K, He at 386K, O2 at 386K

Enter formulas and temperatures in the boxes below: 1 = slowest, 4 = fastest

For heterobimetallic complex M(dppf)Cl2, what are the possible geometries of metal center M? Draw the d-orbital splitting diagrams for those geometries and fill them with electrons. What difference do you observe that can be used to distinguish between the two geometries without using X-ray crystallography?

the following data were acquired in an experiment like ours where the initial amount of hydrogen peroxide is 0.0035 moles. Find the rate constant.

0.0000753 0.008 0.0003466 1.839 0.0007398 4.150 0.0010596 7.423

A solution contains Al3+ and Co2+. The addition of 0.3628 L of 1.714 M NaOH results in the complete precipitation of the ions as Al(OH)3and Co(OH)2. The total mass of the precipitate is 21.96 g. Find the masses of Al3+and Co2+ in the solution.

A 10.0 g piece of pure aluminum is placed in 75.0 mL of 0.54 M hydrochloric acid at STP condition. They react as follows: 2Al + 6HCl → 3H2(g) + 2AlCl3 Calculate the following:

a. Volume, in liters, of hydrogen gas.

b. Molarity of Al+3. (Assume 75.0 mL solution.)

c. Molarity of Cl–. (Assume 75.0 mL solution.)

For each reaction, identify the Bronsted-Lowry acid, the Bronsted-Lowry base, the conjugate acid, and the conjugate base-

HBr(aq)+H2O(l)→H3O+(aq)+Br−(aq) Express your answers as a chemical expressions. Enter your answers in order given in the question separated by commas. NH3(aq)+H2O(l)⇌NH+4(aq)+OH−(aq) Express your answers as a chemical expressions. Enter your answers in order given in the question separated by commas. HNO3(aq)+H2O(l)→H3O+(aq)+NO−3(aq) Express your answers as a chemical expressions. Enter your answers in order given in the question separated by commas. C5H5N(aq)+H2O(l)⇌C5H5NH+(aq)+OH−(aq) Express your answers as a chemical expressions. Enter your answers in order given in the question separated by commas.

1.)

What is the rate law for the following mechanism in terms of the overall rate constant kkk?

A-

Express your answer in terms of kkk and the necessary concentrations (e.g., k*[A]^3*[D]).

B-

Consider the reaction

2X2Y2+Z2⇌2X2Y2Z2X2Y2+Z2⇌2X2Y2Z

which has a rate law of

rate=rate= k[X2Y2][Z2]k[X2Y2][Z2]

Select a possible mechanism for the reaction.

View Available Hint(s)

Consider the reaction

which has a rate law of

Select a possible mechanism for the reaction.

When did you finally stoped heating Cu and sulfur mixture in chemical reaction of copper lab? Which of the following are redox reactions ?

Explain your answer on the basis of changes in oxidation number. 1. CuSO4 + 2NaOH → Cu(OH) 2 + Na 2SO4

2. 2Al + 3MgSO4 → 3Mg + Al 2(SO4)3

3. 2(NH4)3PO4 + 3Ba(NO3)2 → Ba 3(PO4)2 + 6NH4NO3

4. 2HNO3 + 3H3AsO3 → 2NO + 3H 3AsO4 + H2O

For the following reaction, 22.0 grams of iron are allowed to react with 45.3 grams of chlorine gas . iron(s) + chlorine(g) iron(III) chloride(s) . What is the maximum mass of iron(III) chloride that can be formed? ____grams . What is the FORMULA for the limiting reagent?. What mass of the excess reagent remains after the reaction is complete?____ grams

ORGANIC CHEMISTRY:

Draw a balanced chemical reaction for the synthesis of methyl salicylate from aspirin tablets. Calculate the theorectical yield for the product in grams using the limiting reagent aspirin, remembering you are extracting FOUR aspirin tablets and there is 325 mg of aspirin in each one.

Calculate DG for the following reaction if the partial pressure of CO₂ is .05 atm at 25^oC.

CaCO₃(s) yields CaO(s) + CO₂(g)

--------------------------------------------------------

Ca(s) + CO₂(g) + 1/2O₂(g) yields CaCO₃(s)             DH^o=-814.1kJ                        DS^o=-266.3J

2Ca(s) + O₂(g) yields 2CaO(s)               DH^o=-634.9kJ                        DS^o=-250.3J

In a laboratory experiment, 50.0 g of gaseous propane (C3H8) was heated in the presence of air (O2) to produce gaseous carbon dioxide and gaseous water. upon completion of the experiment, 13.0 g of carbon dioxide were obtained.

Balanced Equation: C3H8 (g) + 5O2 (g) --> 3CO2 (g) + 4H2O (g)

a) What is the limiting reactant?

b) what is the theoretical yield?

c) what is the percent yield?