Describe the appearance of:

Silver nitrate test

Commercial 1- bromobutane: unheated? and heated?

Commercial t-butly chloride: unheated? and heated?

Sodium iodide test

Commercial 1- bromobutane: unheated? and heated?

Commercial t-butly chloride: unheated? and heated?

Part A

Determine the [OH−] of a solution that is 0.140 M in CO3.

Express your answer using two significant figures.

Part B

Determine pH of this solution.

Express your answer to two decimal places.

A 0.035 mol sample of a weak acid, HA, is dissolved in 601 mL of water and titrated with 0.41 M NaOH. After 33 mL of the NaOH solution has been added,

the overall pH = 5.281. Calculate the Ka value for the HA.

Let’s write out the acid dissociation:
HA ↔ A– + H+ Ka=???

Now, if we add NaOH (strong base), it will react with the HA (acid). So let’s construct an ICE table in moles to find out what’s left after reaction:

Can you pleae explain how they got the Change value== .0135???

Tia has a sample of pure gold (Au). She weighed the sample and the result was 12.6 grams. Tia wants to determine the number of atoms in the sample. Calculate the number of atoms in 12.6 g of pure gold.

How would I separate and purify 2 out of 3 of: 50% o-toluic acid, 40% fluorene, and 10% 1,4-dibromobenzene, using any of the following: 1M NaOH, 6M NaOH, 1M HCl, 1M NaHCO3, saturated sodium chloride, diethyl ether, 95% ethanol, methanol, alcohol, acetone, hexane, toluene, methylene chloride, or granular anhydrous sodium sulfate?

The decomposition of ozone into oxygen is believed to occur by the following mechanism:

O₃   <-->   O₂ + O       fast, equilibrium

O +   O₃ --> 2 O₂       slow

The rate constant for the overall rate law is 30.6 at 87^oC. If you start with a mixture of 1.5 M O₃ and 3.0 M O₂, what is the initial rate of the reaction?

1.Calculate the pH of a solution obtained by mixing 100 ml of 1 M HEPES and 25 ml of 1 M NaOH and adjusting the volume to one liter with water.

2. Calculate the pH of a solution obtained by mixing 100 ml of 1 M NH3 (pKa 9.25) and 60 ml of 1 M HCl and adjusting the volume to one liter with water. (Answer 9.07)

I want to know the specific calculation to get a final answer. Thank you.

For each of the following compounds, predict the energy barrier to rotation (looking down any one of the C-C bonds 2,2-dimethylpropane & 2-methylpropane

2H₂S (g) = 2H₂ (g) + S₂ (g)

When heated hydrogen sulfide gas decomposes according to the equation above. A 3.40g smple of H₂S(g) is introduced into an evacuated rigid 1.25 L container. The sealed container is heated to 483 K, and 3.72 x10^-2 mol of S₂ (g) is present at equilibrium.

a) Write the expression for the equilibrium constant, K_c for the decomposition reaction represented above.

b) Calculate the equilibrium concentration in M of H₂ (g) and H₂S (g) in the container 483 K

c) Calculate the value of the equilibrium constant K_c for the decomposition reaction of 483K

Calculate the hydroxide ion concentration in a 0.0500 M NaOCl solution. The acid dissociation constant for HOCl is 3.0 x 10^-8.

What mass of hydrochloric acid (in grams) can be neutralized by 2.2 g of sodium bicarbonate? (Hint: Begin by writing a balanced equation for the reaction between aqueous sodium bicarbonate and aqueous hydrochloric acid.)

A phosphate buffer contains 0.075M K₂HPO₄ and 0.125M KH₂PO₄. pKa values for H₃PO₄ are 2, 6.8, and 12.2. Calculate the concentrations of:

1.) H₂PO₄^- concentration

2.) H⁺ concentration

In what direction will the water activity of a liquid food change (higher, lower, or virtually unaltered) if the following changes occur, keeping other factors constant? In each case give an explanation.

1. Addition of sodium chloride

2. Addition of native starch (granules)

3. Heating the food with starch and cooling again to the original temperature without loss of water

4. Enzymatic hydrolysis of the protein present

5. Emulsifying oil into it

6. Freezing part of the water

Three moles of an ideal gas expand isothermally and reversibly from 90 to 300 L at 300 K.

a) Calculate ΔUm, ΔSm, w per mole, and q per mole.

b) If the expansion is carried out irreversibly by allowing the gas to expand rapidly into a vacuum, determine ΔUm, ΔSm, w per mole, and q per mole