Questions
What is the hydrophobic effect and how does it effect membrane formation? What is its’ influence...

What is the hydrophobic effect and how does it effect membrane formation? What is its’ influence on protein folding?

In: Chemistry

Buffer Solution from Strong Base and Weak Acid Solution= 30.0 mL of 1.0 M CH3COOH 5.0...

Buffer Solution from Strong Base and Weak Acid

Solution=
30.0 mL of 1.0 M CH3COOH
5.0 mL of 1.0 M NaOH

1. Calculate the total volume. 35 mL

2. What is the concentration of acetic acid in this solution after mixing? (include units)

3. What is the concentration of sodium hydroxide in this solution after mixing (include units)

4. Calculate the expected pH of this buffer solution.

5. Measured pH of this buffer solution. 3.89

In: Chemistry

pH of the Buffer after the addition of strong base Original buffer solution= 50.0 mL of...

pH of the Buffer after the addition of strong base

Original buffer solution=
50.0 mL of 1.0 M CH3COOH
50.0 mL of 1.0 M NaCH3COO

Take 50.0 mL of this buffer solution and add 2.0 mL of 1.0 M NaOH

Calculate the expected pH of this solution.

In: Chemistry

The solubility of magnesium carbonate is highest in a buffer solution with a pH of :...

The solubility of magnesium carbonate is highest in a buffer solution with a pH of :

a)3.5 b)8.5 c)6.5 d)10.5

Please explain how you come to the conclusion.

In: Chemistry

Why are the effects of enantiomers so different? What is importance of chiral chemistry on pharmacology...

Why are the effects of enantiomers so different? What is importance of chiral chemistry on pharmacology and new drug development? list three examples of pharmacological enantiomers and state the effects of the drugs (good or bad).

In: Chemistry

Balance the following oxidation-reduction reaction equations using 1/2 reaction method: please show work Sb+NO3= Sb2O5+NO NO2...

Balance the following oxidation-reduction reaction equations using 1/2 reaction method:

please show work

Sb+NO3= Sb2O5+NO

NO2 = NO3 + NO

Br2+NH3=NH4BR+N2

In: Chemistry

I. Litmus Paper Observations 1. Report color change for the 0.010M M HCl solution: Red Litmus...

I. Litmus Paper Observations

1. Report color change for the 0.010M M HCl solution:

Red Litmus Paper:

Blue Litmus Paper:

2. Report color change for the 0.010M M NaOH solution:

Red Litmus Paper:

Blue Litmus Paper:

II. Properties of Acid-Base Indicators

1. Phenolphthalein

Report the color in 0.010 M HCl solution:

Report color change on addition of drops of NaOH solution:

Report color change on addition of drops of the HCl solution:

2. Bromocresol Green

Color in 0.010 M HCl solution.

Report color change on addition of drops of NaOH solution

Report color change on addition of drops of HCl solution:

C. Methyl Red

Color in 0.010 M HCl solution.

Report color change on addition of drops of NaOH solution:

Report color change on addition of drops of HCl solution:

III. Titration of a Strong Acid with a Strong Base

Concentration of NaOH solution: ___________________

Determination #1

Volume of HCl solution added to flask (mL) -25.88

Initial Buret Reading (mL) -50

Final Buret Reading (mL) -24.12

Determination #2

Volume of HCl solution added to flask (mL) -25.61

Initial Buret Reading (mL)-50

Final Buret Reading (mL)-24.39

Determination #3

Volume of HCl solution added to flask (mL) -26.7

Initial Buret Reading (mL) -50

Final Buret Reading (mL) -23.0

Calculations

Determination #1, Calculation of molarity of HCl solution:

Determination #2, Calculation of molarity of HCl solution:

Determination #3, Calculation of molarity of HCl solution:

Average of your three determinations _________________

In: Chemistry

38: Critic acid cycle intermediates are always being removed for various reasons but the cycle does...

38: Critic acid cycle intermediates are always being removed for various reasons but the cycle does not run out of intermediates and stop. This is because we can always make intermediates: WE CAN ALWAYS MAKE INTERMEDIATES FOR CITRIC ACID CYCLE FROM?

A. from acetyl-CoA

B. from even chain fatty acids

C. from the catabolism of heme in the spleen

D. using anaplerotic reactions

In: Chemistry

uses and applications of maskig and demasking agents

uses and applications of maskig and demasking agents

In: Chemistry

A 5.91 g unknown sample analyzed by elemental analysis revealed a composition of 37.51 % C....

A 5.91 g unknown sample analyzed by elemental analysis revealed a composition of 37.51 % C. In addition, it was determined that the sample contains 1.4830 x 10^23 hydrogen atoms and 1.2966 x 10^23 oxygen atoms. What is the empirical formula?

In: Chemistry

Which is faster? The addition of HBr to 2-methyl propene or addition of HBr to trans-2-butene?...

Which is faster? The addition of HBr to 2-methyl propene or addition of HBr to trans-2-butene? *Assume the energy difference between starting Allene's can be ignored. Explain why for your answer.

In: Chemistry

Based on the standard analytical practice during a titration of taking pH-volume measurements every 0.3 pH...

Based on the standard analytical practice during a titration of taking pH-volume measurements every 0.3 pH units, how many measurements should you take between the addition of 5 mL and 7.5 mL of titrant, (a) in the titration of a 10-mL aliquot of standard 0.1500 M TRIS base (pKb = 1.2 X 10-6) (in beaker) with 0.1000 M HCl (in buret). (b) in the titration of a 10-mL aliquot of 0.1500 M NaOH (in buert) with standard 0.1000 M HCl (in buret).

Hints: To solve these questions, it may be helpful to draw a diagram of the titration set up. Before starting, reason out whether the pH will increase or decrease with the addition of titrant. You need to calculate the pH at the 5 and 7.5 mL points in each of the two titrations. Because HCl and NaOH are a strong acid and base respectively, they dissociate completely and the pH of the solution is dependent only on the excess acid or base in the beaker at that point in the titration.

In: Chemistry

5a. What is the pH at the equivalence point in the titration of 50.00 mL of...

5a. What is the pH at the equivalence point in the titration of 50.00 mL of 0.400 M B (a generic base with Kb = (5.00x10^-10))with 0.200 M HNO3?

5b. What is the pH at 110.00 mL of titrant in the titration of 50.00 mL of 0.400 M B (a generic base with Kb = (7.18x10^-9))with 0.200 M HNO3?

Please help, will rate

In: Chemistry

Make a sketch of SF 4 using hatched and solid wedges if necessary for the three-dimensional...

Make a sketch of SF 4 using hatched and solid wedges if necessary for the three-dimensional structure. Draw the molecule by placing atoms on the grid and connecting them with bonds.

In: Chemistry

A PLGA 15:85 polymer made of 15% PLA and 85 % PGA degrades very fast. One...

A PLGA 15:85 polymer made of 15% PLA and 85 % PGA degrades very fast. One of your colleagues suggests tripling the amount of the more hydrophobic PLA in the copolymer to slow down the degradation. Do you agree with him? Why?

In: Chemistry