Homework Answers
QUESTION 5
A)In this type of experiments, the most used salt is ammonium sulfate. However, depending of what you want to precipitate, you can vary the concentration of the salt. If you want to precipitate nucleic acids, you can use a concentration of 30% w/v of salt. If you want to precipitate protein, you can use 65% w/v.
B) The salt is used to reduce the solubility of the sample that you want to precipitate. In this context, the water molecules will attach to the ions of the salt, decreasing the water molecules attached to the protein and allowing its precipitation.
Note: According to Chegg’s guidelines, you have to send just one question. Please, send each question separate so all experts can answer each of your questions. Thank you!.
Add Answer to:
Name the salt which you have used in "salting out"
experiment?
5. A. Name the salt...
Experiment 5 Prelaboratory Assignment Percent Water in a Hydrated Salt chloride, a deliquescent salt, is used...
Experiment 5 Prelaboratory Assignment Percent Water in a Hydrated Salt chloride, a deliquescent salt, is used as a desiccant in laboratory desiccators to maintain a dry environment Date ab SecName Desk No. Explain. 1sb 2. Experimental Procedure, Part A.1. What is the purpose of firing the crucible? 3. A 1.803-g sample of gypsum, a hydrated salt of calcium sulfate, Caso., is heated at a temperature greater than 120 C in a crucible until a constant mass is reached. The mass...
i need help with C.) EXPERIMENT 16 ACIDS AND BASES: COMPLETE CURVE ANALYSIS HOMEWORK EXERCISES Name...
i need help with C.)
EXPERIMENT 16 ACIDS AND BASES: COMPLETE CURVE ANALYSIS HOMEWORK EXERCISES Name Titration of 50.00 mL HNO, with 0.3850 M NaOH 14 12 10 8 pH 6 4 2 0 30 25 20 0 5 10 15 ml NaOH Added % Equivalence Point ml. pH 1. a. Determine the following from the above graph: Initial Equivalence Point pH [H) ml. pH 2.10 7,94 +10 18.50 8.00 4.25 3.3 b. Write the reactions with the appropriate arrows...
In carrying out the first standardization in an experiment, a student used 0.5449g of potassium hydrogen...
In carrying out the first standardization in an experiment, a student used 0.5449g of potassium hydrogen phthalate (KHP) and 24.35mL of NaOH solution is needed to reach the equivalence point. What is the concentration of the students NaOH solution
3. After carrying out the aspirin synthesis experiment, suggest two experiments or techniques (give only name...
3. After carrying out the aspirin synthesis experiment, suggest two experiments or techniques (give only name of Experiment) based on what you have learned last few weeks to confirm the preparation and purity of aspirin. (1 Point) 4. A commercial aspirin tablet contains 325 mg of aspirin. How many tablets could you manufacture from your aspirin? (1 Point) 5. Do you think your aspirin is suitable for preparing aspirin tablet? Why? (1 Point)
Name: Date: Instructor's Initials: Lab Section: Enthalpy PreLab What would happen if you used a wet...
Name: Date: Instructor's Initials: Lab Section: Enthalpy PreLab What would happen if you used a wet beaker to obtain your acid solution? How might this affect your results? 2. What is the difference between heat capacity and specific heat? 3. What is the purpose of using volumetric glassware for this experiment? 4. Why rinse the pipet three times with the solution to be used? How many ml of solution should be used to rinse the 100.00 mL pipet-5 mL, 10...
Experiment Properties of Solutions 112/ Roll No. Name: Section:__ Date: Post-lab Questions 1. Did you observe...
Experiment Properties of Solutions 112/ Roll No. Name: Section:__ Date: Post-lab Questions 1. Did you observe a difference in conductivity of deionized water and tap water. If yes, explain why there is a difference 2. What was the conductivity of solid sodium chloride? What was the conductivity of the mixture when water was added to the salt? Explain your observations 3. Indicate whether solutions of each of the following contain (a) only ions, (b) only molecules, or (c) mostly molecules...
Let's say you did this part of the experiment and you obtained the following information: -...
Let's say you did this part of the experiment and you obtained the following information: - You used 0.192 g of unknown acid for your titration. - It took you 26.42 mL of 0.05 M NaOH to reach the equivalence point. - The pH at half-equivalence point was 3.18. Questions: 1. How many moles of NaOH were required to reach equivalence point? See your lab manual for help (page 97). (2 points) 2. How many moles (or equivalents) of unknown...
Experiment Properties of Solutions 112/ Roll No. Name: Section:__ Date: Post-lab Questions 1. Did you observe a dif...
Experiment Properties of Solutions 112/ Roll No. Name: Section:__ Date: Post-lab Questions 1. Did you observe a difference in conductivity of deionized water and tap water. If yes, explain why there is a difference 2. What was the conductivity of solid sodium chloride? What was the conductivity of the mixture when water was added to the salt? Explain your observations 3. Indicate whether solutions of each of the following contain (a) only ions, (b) only molecules, or (c) mostly molecules...
PRE LAB : Volumetric Titrations. (Acid-Base Titrations) Name: ID Date 1. How many mL of a...
PRE LAB : Volumetric Titrations. (Acid-Base Titrations) Name: ID Date 1. How many mL of a 0.103M NaOH solution are required to neutralize 10.00mL of a 0.198M HCI solution? 2. what is the difference between end point and equivalence point? 3. A titration is performed and 20.70 mL of 0.500M KOH is required to reach the end point when titrated against 15.00 mL of H2SO4 of unknown concentration. Write the chemical equation and solve for the molarity of the acid....
Experiment 5 Prelaboratory Assignment Percent Water in a Hydrated Salt chloride, a deliquescent salt, is used as a desiccant in laboratory desiccators to maintain a dry environment Date ab SecName Desk No. Explain. 1sb 2. Experimental Procedure, Part A.1. What is the purpose of firing the crucible? 3. A 1.803-g sample of gypsum, a hydrated salt of calcium sulfate, Caso., is heated at a temperature greater than 120 C in a crucible until a constant mass is reached. The mass...
i need help with C.)
EXPERIMENT 16 ACIDS AND BASES: COMPLETE CURVE ANALYSIS HOMEWORK EXERCISES Name Titration of 50.00 mL HNO, with 0.3850 M NaOH 14 12 10 8 pH 6 4 2 0 30 25 20 0 5 10 15 ml NaOH Added % Equivalence Point ml. pH 1. a. Determine the following from the above graph: Initial Equivalence Point pH [H) ml. pH 2.10 7,94 +10 18.50 8.00 4.25 3.3 b. Write the reactions with the appropriate arrows...
Name: Date: Instructor's Initials: Lab Section: Enthalpy PreLab What would happen if you used a wet beaker to obtain your acid solution? How might this affect your results? 2. What is the difference between heat capacity and specific heat? 3. What is the purpose of using volumetric glassware for this experiment? 4. Why rinse the pipet three times with the solution to be used? How many ml of solution should be used to rinse the 100.00 mL pipet-5 mL, 10...
Experiment Properties of Solutions 112/ Roll No. Name: Section:__ Date: Post-lab Questions 1. Did you observe a difference in conductivity of deionized water and tap water. If yes, explain why there is a difference 2. What was the conductivity of solid sodium chloride? What was the conductivity of the mixture when water was added to the salt? Explain your observations 3. Indicate whether solutions of each of the following contain (a) only ions, (b) only molecules, or (c) mostly molecules...
Let's say you did this part of the experiment and you obtained the following information: - You used 0.192 g of unknown acid for your titration. - It took you 26.42 mL of 0.05 M NaOH to reach the equivalence point. - The pH at half-equivalence point was 3.18. Questions: 1. How many moles of NaOH were required to reach equivalence point? See your lab manual for help (page 97). (2 points) 2. How many moles (or equivalents) of unknown...
Experiment Properties of Solutions 112/ Roll No. Name: Section:__ Date: Post-lab Questions 1. Did you observe a difference in conductivity of deionized water and tap water. If yes, explain why there is a difference 2. What was the conductivity of solid sodium chloride? What was the conductivity of the mixture when water was added to the salt? Explain your observations 3. Indicate whether solutions of each of the following contain (a) only ions, (b) only molecules, or (c) mostly molecules...
PRE LAB : Volumetric Titrations. (Acid-Base Titrations) Name: ID Date 1. How many mL of a 0.103M NaOH solution are required to neutralize 10.00mL of a 0.198M HCI solution? 2. what is the difference between end point and equivalence point? 3. A titration is performed and 20.70 mL of 0.500M KOH is required to reach the end point when titrated against 15.00 mL of H2SO4 of unknown concentration. Write the chemical equation and solve for the molarity of the acid....
Most questions answered within 3 hours.
-
) Assume that in the market for widgets, demand is highly
elastic compared to supply. If...
asked 2 minutes ago -
Why is a personal interview the most important step in the sales
selection process? What are...
asked 12 minutes ago -
In Python rOverlap (x1, y1, w1, h1, x2, y2, w2, h2) A rectangle
is axis-aligned if...
asked 12 minutes ago -
If we observe in a protein solution that DNA is causing a
mixture 260/280 ratio ~0.9,...
asked 22 minutes ago -
Explain the steps involved in making cDNA from mRNA, and how you
would create a cDNA...
asked 23 minutes ago -
A beta (β) particle is described by which of the following?
Select the correct answer below:...
asked 26 minutes ago -
A new machine costs $150,000, lasts 10 years, has an annual
O&M cost of $50,000, and...
asked 29 minutes ago -
A newspaper in a large Midwestern city reported that the
National Association of Realtors said that...
asked 30 minutes ago -
1. Develop a use case diagram for the bank case study described
in Chapter 1. 2....
asked 40 minutes ago -
The phylum Protista has often been referred to as a junk drawer
of classification. Explain what...
asked 47 minutes ago -
The average amount of money spent for lunch per person in the
college cafeteria is $7.09...
asked 49 minutes ago -
You follow the lab procedure and at the end of Part 4C, you used
an average...
asked 1 hour ago