A saline-sodium citrate buffer is a commonly used reagent in biochemistry/molecular biology. In this reagent the...

A saline-sodium citrate buffer is a commonly used reagent in biochemistry/molecular biology. In this reagent the "saline" refers to aqueous sodium chloride present at a molality of 3.000 M. If the density of a 3.000 M aqueous solution of NaCl is 1.115 g/mL, what is the molality of this solution?

Solutions

Expert Solution

queen_honey_blossom answered 1 year ago

Next > < Previous

Related Solutions

3.Phosphate-buffered saline (PBS) is a buffer solution commonly used in biological research. Most formulations contain a...

3.Phosphate-buffered saline (PBS) is a buffer solution commonly used in biological research. Most formulations contain a mixture of KCl and NaCl buffered to a pH of 7.40 using phosphate-containing compounds. a.The following reagents are available in your lab. Choose the correct reagents and calculate the volumes necessary to prepare exactly 5.0 L of a phosphate buffer with a pH of 7.40. 0.100 M H3PO4 0.150 M Na2HPO4 0.200 M KH2PO4 0.120 M Na3PO4 b.Commercial PBS solutions are typically prepared...

A common buffer used in biochemistry is a pH 7.4 phosphate buffer. Such a buffer costs...

A common buffer used in biochemistry is a pH 7.4 phosphate buffer. Such a buffer costs $53.00 for 100.00 mL from a common chemical supply house. Therefore, it is useful to know how to prepare such a buffer yourself! Imagine that you have available 0.1 M KH2PO4 and solid K2HPO4. Describe in detail how you would prepare 100.00 mL of a pH 7.4 phosphate buffer using these two reagents. **Hint: You need to identify what is your acid and what...

1. Describe the molecular biology and biochemistry. 2. State the importance of studying the biological phenomena....

1. Describe the molecular biology and biochemistry. 2. State the importance of studying the biological phenomena. 3. Distinguish between prokaryotes and eukaryotes. 4. List the similarities between prokaryotes and eukaryotes. 5. State the functions of the following cell components: a) cytosol b) mitochondria c) chloroplast d) vacoule 6. Explain about van der walls interaction. Give an example to support your explanation. 7. Why CH4 molecule is not capable for hydrogen bond? 8. Discuss the properties of water that make it...

(a). Why a buffer is commonly used in biochemical reaction? In protein isolation, protease inhibitors are...

(a). Why a buffer is commonly used in biochemical reaction? In protein isolation, protease inhibitors are commonly present in the buffer solution, why? (b). What is the structure of ammonium sulfate? How does ammonium sulfate work to precipitate and fractionate proteins in cell-free extract? (c). How to define “% saturation of ammonium sulfate”? Be specific.

Make up a case where molecular biology can be used to prosecute a suspect accused of...

Make up a case where molecular biology can be used to prosecute a suspect accused of growing and selling marijuana. How would molecular biology be used? What evidence or results would be needed to convict the suspect?

How can molecular biology techniques be used to identify genetic disease conditions in fetal or adult...

How can molecular biology techniques be used to identify genetic disease conditions in fetal or adult humans? Provide two examples. basic biotechnology

aspirin, a commonly used pain reliever, is a weak organic acid whose molecular formula may be...

aspirin, a commonly used pain reliever, is a weak organic acid whose molecular formula may be written as HC9H7O4. an aqueous solution of aspirin has a total volume of 350ml and contains 1.26g of aspirin. the pH of the solution is found to be 2.60. what does Ka stand for, what do you need to calculate Ka

Cacodylic acid (dimethylarsinic acid, HAsO2(CH3)2) is a common buffer used in biology to prepare and fix...

Cacodylic acid (dimethylarsinic acid, HAsO2(CH3)2) is a common buffer used in biology to prepare and fix biological samples. The pKa of cacodylic acid is 6.3. Please show where you are getting your numbers from because I looked at other similar questions but I'm not too sure how they got some of the numbers. Thanks! Part A: What is the pH of a buffer solution prepared by mixing 20.0 mL of 0.0400 molL−1NaOH with 20.0 mL of 0.140 molL−1 cacodylic acid?...

Cacodylic acid (dimethylarsinic acid, HAsO2(CH3)2) is a common buffer used in biology to prepare and fix...

Cacodylic acid (dimethylarsinic acid, HAsO2(CH3)2) is a common buffer used in biology to prepare and fix biological samples. The pKa of cacodylic acid is 6.3. Part A What is the pH of a buffer solution prepared by mixing 20.0 mL of 0.0700 molL−1NaOH with 20.0 mL of 0.170 molL−1 cacodylic acid? Express your answer using one decimal place. pH = Part B What is the pH of the buffer solution in part A after 0.0002 moles of H3O+ was added...

Subjects