describe how you prepare the following laboratory
sample
a) solid
b)liquid
Please give the name of the samples that you're willing to prepare. Without that information, it's impossible for me to help you.
describe how you prepare the following laboratory sample a) solid b)liquid
3) Describe how to prepare the following solutions using solid sodium iodide, liquid water and common laboratory equipment (balance, spatulas, volumetric flasks, pipets, beakers, etc.) a) 200mL of 0.16M Nal b) 200mL of 0.16m Nal c) 200mL of 0.16% mass Nal
Describe how you would prepare each of the following aqueous solutions, starting with solid KBr. A. 0.90 L of 1.4×10−2 M KBr B. 110 g of 0.160 m KBr C. 1.95 L of a solution that is 14.0 % KBr by mass (the density of the solution is 1.10 g/mL) D. a 0.130 M solution of KBr that contains just enough KBr to precipitate 16.0 g of AgBr from a solution containing 0.480 mol of AgNO3
Describe how would you prepare a benzoic acid-benzoate buffer with pH = 4.25. Available to you are 4.0 M sodium benzoate, solid benzoic acid (MW= 122.12 g/mol), water and a full laboratory of glassware. Ka = 6.3 x 10-5 for benzoic acid (C6H5COOH). Kw = 1.0 x 10-14.
The following diagram shows AAS processes. Please match.
Thanks.
Liquid sample, liquid droplets, gas molecules, solid particles, solid sample, gas sample, AAS, AES, excited gas atoms or ions heating HCL Gas atoms 6 hv heating heating heating Nebulize
describe how you would prepare 2 L of NaOH from .250 M NaOH from NaOH solid.
Pre-Lab Questions of Exp.4 Extraction (liquid-liquid and liquid –solid) Define extraction? How you choose solvent for proper extraction? What is the difference between liquid-liquid and liquid-solid extraction? What are nutrients? Give two examples
describe the continuum of liquid-liquid crystal-solid. discuss the differences in terms of physical properties
Describe how you would prepare 250 ml of 0.2M phosphate buffer, pH =12.5, given solid Na2HPO4.2H2O and Na3PO4.H2O. pKa= 4.75
A laboratory group measures an excess of an unknown liquid. They add this to an empty flask for which they calculate the volume. They heat the sample in a water bath until all liquid has been vaporized for several minutes. the sample is cooled and measured. Use their laboratory data (listed below) to answer the following questions: Calculate the mol of gas in the flask using the ideal gas law: Calculate the molar mass of the unknown: If a student...
b) How is it possible that a solid or liquid has a vapor pressure?