FIND THE PH AN OH- OF EACH. (Round to the second decimal place.)

a. 5.0×10⁻² M NaBrO.

b. 8.0×10⁻² M NaHS.

c. A mixture that is 0.13 M in NaNO2 and 0.22 M in Ca(NO2)2.

a) Describe the specific reaction that occurs in each of the tests when they are positive by describing what happens chemically to give a blue-green solution in the Chromic Acid test (positive test), what happens to give a silver precipitate in the Tollen�s test (positive test) and what happens to give a precipitate in the Iodoform test (positive test).

b)describe how you could use any single instrumental method to distinguish all of the unknown above. you mayuse MS, IR, H-NMR or C-NMR to distinguish the series of molecules and you should describe a single structural feature in each that will be diagnose by the method you chosed

What role does the leaving group play on the rate of SN1 versus SN2 reactions? (compare 1-bromo to 1 chloro, 2-bromo to 2-chloro etc).What role does the structure of the substrates play on the rate of SN1 versus SN2 reactions (compare primary,secondary and tertiary that may have the same leaving group)

where is the chiral carbon located?

the structural fomula and fraction present calculated to three significant digits.

a.citric acid at ph=2,6,10

b.threonine at ph=2,6,10

c.Glutamic acid at ph=2,6,10

3. For eukaryotes, the P/O ratio when NADH is used as a substrate has been measured to be ~2.5 under optimal conditions.

a) How does this P/O ratio relate to the number of c subunits that comprise the F0 portion of the ATPase?

b) In prokaryotes, the number of c subunits varies. Calculate the theoretical P/O ratio for an organism that has 15 c subunits in its ATPase.

For this important smog reaction the experimental rate law is r=kexp [NO]^2[O2]. a.) Show that the following mechanism is consistent with the rate law and identify keep proposed mechanism. NO+NO<--> N2O2 fast k1/k-1 N2O2+O--> 2 NO2 slow k2
b.) What is the function of N2O2 and how do you know?
c.)What is the difference between a catalyst and an intermediate ?
d.) Activation energies are: 82(r1), 205(r-1, and 82(r2) kJ/mol. If the Arrhenius pre-exponential factors all approximately the same what happens to the overall rate as the temperature is increased?
What is d saying?

Calculate the pH after 0.017 mole of HCl is added to 1.00 L of each of the four solutions. (Assume that all solutions are at 25°C.) (a) 0.128 M butanoic acid (HC4H7O2, Ka = 1.5 ✕ 10−5) (b) 0.128 M sodium butanoate (NaC4H7O2) (c) pure H2O (d) 0.128 M HC4H7O2 and 0.128 M NaC4H7O2

Preparation of Copper(I) Chloride

Reactions:

1) Cu(S) + 4HNO₃(aq) -> Cu(NO₃)₂(aq) + 2NO₂(g) + 2H₂O(l)

2) 2HNO₃(aq) + Na₂CO₃(s) -> H₂O(l) + CO₂(g) + 2NaNO₃(aq)

3)Cu(NO₃)2(aq) + Na₂CO₃(s) -> CuCO₃(s) + 2NANO3(aq)

4)CuCO_3(s) + 2HCL(aq) -> CuCl_2(aq) + H₂O_(l) + CO_2(g)

5)CuCl₂(aq) + Cu(s) -> 2CuCl(s)

Report:

Weight of Copper: 1.004g

Volume of Added Nitric Acid: 4.9mL

Total weight of added Sodium Carbonate: 3.841g

Weight of watch glass and filter paper: 51.740g

Weight of watch glass, filter paper, and CuCl Precipitate: 53.513g

Experimental Yield of CuCl: 1.775g

Theoretical Yield of CuCl: 3.55g

Percent Yield of CuCl: 50%

Could we use HCl to dissolve the copper metal instead of nitric acid in the first reaction? Please explain.

The complete combustion of octane, a component of gasoline, proceeds as follows: 2 C8H18+25 O2 produces 16 CO2+18 H20 How many moles of O2 are needed to burn 1.50mol of C8H18? Octane has a density of 0.692g/ml at 20 degrees celsius . How many grams of O2 are required to burn 15.0gal of C8H18?

What is the pH of a solution prepared by mixing 60.0 mL of 0.20M potassium carbonate (K2CO3) with 140.0 mL of 0.1M potassium bicarbonate (KHCO3)? a. 6.43 b. 6.30 c. 6.67 d. 10.32 e. 10.18

Tacticity of polymers and its influence on properties of polymers with specific examples