pre lab question: Formulate a hypothesis that address the following question: How will adding more alcohol...

pre lab question:

Formulate a hypothesis that address the following question: How will adding more alcohol to a solution of potassium oxalate and iron oxalate affect the size of the crystals that form from this solution?

Expert Solution

The crystals formed from the solution are of potassium ferrioxolate. When the concentration of alcohol increases in the system, it increases the Gibbs Free Energy of the system. Since is directly proportional to the rate of a reaction, (from the below equation)

If K is the rate constant for the formation of crystals, it increases with high concentration of alcohol.

Addition of alcohol simply to precipitate the crystals gives small crystals since high of the system causes high K value and hence the crystals are formed very fast. Formation of crystal in a less time allows it to form many small crystals instead of further growing in size. But, addition of alcohol on the surface of the solution slowly allows it to diffuse slowly through the solution and causes it to grow slowly over a period of time causing larger sixe crystals unlike the formation of many small sized crystals in the earlier case.

queen_honey_blossom answered 3 years ago

(1) Pre Lab Question: You are working in the lab and are told to create an...

(1) Pre Lab Question: You are working in the lab and are told to create an artificial membrane from phospholipids. You are then instructed to add certain solutes to the membrane to see if it works appropriately. Rank the permeability for the following across a phospholipid membrane for the following: lysine, urea, sodium ion, insulin, water, indole

Address the following question. Use at least 250 words to address this question. How does the...

Address the following question. Use at least 250 words to address this question. How does the interactions between parasite or predator host affect how susceptible the crop is to the pests and how the interactions may be used as elements of a control program.

Provide example of your own research question. Formulate hypothesis for your research question and independent and...

Provide example of your own research question. Formulate hypothesis for your research question and independent and dependent variables for this question.

6. Provide example of your own research question. Formulate hypothesis for your research question and independent...

6. Provide example of your own research question. Formulate hypothesis for your research question and independent and dependent variables for this question.

In each of the following exercises, formulate an appropriate null hypothesis and perform a test of...

In each of the following exercises, formulate an appropriate null hypothesis and perform a test of that null hypothesis at the 5% and 1% signiﬁcance levels. Use a one-sided or two-sided test as appropriate. 10. An instructor administers a 2-minute sit-up test to a class of 10 students, obtaining the following scores. X : 55,45,48,62,58,60,42,44,53,55 The instructor expects students to have an average score of no more than 45 on the sit-up test. Part (a) Assume that 10 is the...

How to formulate a hypothesis? and test and verify it? ( i need very good EXAMPLES...

How to formulate a hypothesis? and test and verify it? ( i need very good EXAMPLES thank you)

Question 5 All of the following support the hypothesis that the development of cancer requires more...

Question 5 All of the following support the hypothesis that the development of cancer requires more than one rare mutation to occur in one cell EXCEPT cancer risk increasing with age the appearance of cancer is typically years after the exposure to the causitive agent many cancers become resistant to chemotherapy over time in individuals with inherited mutations in a tumor supressor gene, cancer does not always develop

Pre-Lab 7: Buffers for Cytochrome c purification and redox assays Describe how to prepare the following...

Pre-Lab 7: Buffers for Cytochrome c purification and redox assays Describe how to prepare the following solutions in water: 2mL of 45% of ammonium sulfate 50 mL of 20mM Tris pH 8.0 using a 1M Tris pH 8.0 stock solution 50 mL of 1M Glycine pH 10.0 Molecular weight: Ammonium sulfate = 132.14 g/mol Tris base = 121.14 g/mol Glycine = 75.07 g/mol What is ammonium sulfate precipitation? What is the isoelectric point (pI) of Cytochrome c?

pre lab question: 1. Assume for the moment that air consists of 80.00% nitrogen (N2) and...

pre lab question: 1. Assume for the moment that air consists of 80.00% nitrogen (N2) and 20.00% oxygen (O2) by volume. Use these figures and typical values for temperature and pressure (1.000 atm and 25.00°C) to calculate the density of air in g/L. 2. Explain how you will determine the mass of CO2 gas in your flask. 3. This experiment will require you to know the volume of the air/gas present in your flask. How will you measure this volume?...

Question 1 Which of the statements below is the best hypothesis for the osmosis lab. If...

Question 1 Which of the statements below is the best hypothesis for the osmosis lab. If a salt water solution is placed inside of the potato and plain tap water is placed outside of the potato then osmosis will occur and water molecules will move into the potato. And the level of water inside of the potato will rise. If plain tap water is placed inside of the potato and a solution of salt water is placed outside of the...

Question