3. Recall the steel phase diagram where ferrite iron had a max C solid solubility of 0.022 wt% Cbut austenite could take up to 2.14 wt% C! The carbon solubility in iron varies dramatically
between the different phases. Explain why demonstrating with a calculation (hint: austenite isFCC whereas ferrite is BCC

Given: 50 ml of 0.2 M weak acid is titrated with 0.2M NaOH. The pka of the acid is 4.7

1. What is the pH at the equivalence point?

2. What is the ph when 60ml of NaOH is added? (Total Amt of NaOH is 60ml)

3. What is the pH when 10ml of NaOH is added?

4. What would be the approximate ph of a 0.1 M NaCl solution?

1. The carboxylic acid group of an amino acid has a pKa of approximately 2. However, carboxylic acids like benzoic acid and acetic acid have pKas in the range of 4-5 pKa units. Explain why the carboxylic acid of an amino acid is more acidic.

2. Consider the amino acid arginine: a. At physiological pH (pH = 7.4), what is the predominant form in solution? b. What percent of the carboxylic acid group is ionized at this pH? c. What percent of the amino group is ionized at this pH?

For a magnesium fluoride, MgF2, Ksp= 6.4x10^-9, calculate the molar solubility in pure water.

Calculate the molar solubility in 0.050 M NaF solution.

Please show step by step instructions, thank you!

How much heat is required to convert 84.9 g of ice at -17.0 C to steam at 114 C?

What mass of Cu(OH)2 (MM= 97.56 g/mol) will dissolve in ,500 L of a pH solution (Ksp=2.2*10 ^=20). In which solution is Cu(OH)2 most soluble and least soluble: A. .01 M NaCl, B. .01M CuCl2, C. .01 HCL, or D. .01NaOH.

Consider the equation: 3CuO(s)+2NH3(g)--->N2(g)+3Cu(s)+3H2O(l)

How many moles of nitrogen gas could be made from:

a) 5.00 Mol CuO and 2.00 mol NH3

b) 6.00 mol CuO and 6.00 mol NH3

500kgh-1 of a 10% w/w solutionof a compoun X(OH)2 is to be treated using a 5% excess of 20% w/w solution of Na2CO3 to precipitate the X as its carbonate according to the balanced reaction equation: X(OH)2 + Na2CO3 ------> XCO3 + 2NaOH All the solid is filtered off but some solution remains with the solid such that the solution forms 4% w/w of the total mass removed. the filtered liquid product is then neutralised with 2 molar hydrochloric acid according to the reactions NaCO3 + 2HCl -----> 2NaCl + H2O + CO2 NaOH + HCl -----> NaCl + H2O Calculate: 1. the amount (kgh-1) of sodium carbonate solution required. 2. the amount (kgh-1) and composition (%w/w) of the solid product after filtration 3. the amount (kgh-1) and composition (%w/w) of the solid product after filtration. 4. the amount of acid (in litres per hour) required for neutralisation data: Relative atomic mass of X= 40, O=16, H=1, Na= 23, C= 12, Cl= 35.5

Mass spectrometry

You examine the MS data from a GC-MS analysis. You notice there is quite a lot of fragmentation but are ansure if the molecular ion is visible.Explain,in detail,why this might be the case and what you could do to ensure you can work out the molecular mass of the analyte?

A.)Use the steady-state approximation

B.)And the rate determining step approximation to derive the rate equation.The gas-phase decomposition of ozone, 2O₃ -> 3O₂, is believed to have the mechanism. M is any molecule.   Compare the the results of the 2 methods

              k₁

O₃ + M ? O₂ + O + M fast equilibrium

  k_-1

O + O₃ -> 2O₂                        Slow

k₂

Prelab to accompany bromination of trans-cinnamic acid (4 pts each)

The stoichiometry of the addition is 1:1, meaning that for every one mole of transcinnamic acid, one mole of Br2 is needed to form the addition product. The Br2 presents as a solution in dichloromethane solvent. This often causes problems for students when calculating stiochiometric equivalents. The bromine solution is 10% Br2 by volume. For instance, 100 mL of solution contains 10 mL of liquid Br2. The density of Br2 is 3.12 g/mL.

Calculate the number of mmol of Br2 present in 0.48 mL of bromine solution

Calculate the number of mmol in 100. mg of trans-cinnamic acid (use a MW calculated to 2 decimal places)

Which is the limiting reagent?

What is the theoretical yield of the addition product? (use a MW calculated to 2 decimal places)

Show all calculations.

Inorganic Chem: Please show neat, well explained answer

Homogeneous Catalysis

Explain why Rh(PPh₃)₃Cl rapidly undergoes oxidative addition reactions.

There is 50,000 times more cobalt available in the Earth’s crust. Why don’t we use Co(PPh₃)₃Cl for alkene hydrogenation?

Please describe in detail the mechanism for the formation of 2R,3S/2S,3R-2,3-dibromo-3-phenylpropanoic acid. Based on the stereochemistry of bromine addition.

Please, don't only use drawings (although they can be of help), i would pefer it written. Thankyou.

If you add a 1 cm³ (1 ml) cube of salt (density 2.16 g/cm³) to 10 ml of water (1 g/cm³) what is a reasonable total volume?

If you add a 1 cm³ (1 ml) cube of salt (density 2.16 g/cm³) to 10 ml of water (1 g/cm³) what is a reasonable final density?

If you add a 1 cm³ (1 ml) cube of salt (density 2.16 g/cm³) to 10 ml of water (1 g/cm³) what is a reasonable final mass?

If you add a 1 cm³ (1 ml) cube of salt (density 2.16 g/cm³) to 10 ml of oil (.85 g/cm³) what is a reasonable total volume?

If you add a 1 cm³ (1 ml) cube of salt (density 2.16 g/cm³) to 10 ml of oil (.85 g/cm³) what is a reasonable final density?

If you add a 1 cm³ (1 ml) cube of salt (density 2.16 g/cm³) to 10 ml of oil (.85 g/cm³) what is a reasonable final mass?

Over the course of the semester, we studied several techniques (spectrophotometry, acid-base titrations, redox experiments) to answer questions related to quantification and identification of compounds, kinetics of chemical reactions,and equilibrium constants. With some background research, write a researchable question that could be answered with one or more of the techniques used during the semester.Write a research plan to answer the question. The plan does not have to be a detailed step by step procedure, but an overview of the experiment including controls and how you would “work up” the data to answer your question.

The question I would like is...how to determine the quanity in compounds? But to me it seems like question is not really a research question.

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