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
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
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 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?
Discuss with those in you laboratory section the consequences of incorrect sample loading, variable sample size, and rates of heating and how these factors might lead you to obtain an incorrect value of the melting point for your solid sample.
13.54 Describe how you would prepare each of the following aque- ous solutions: (a) 1.50 L of 0.110 M (NH4)2SO4 solution, starting with solid (NH4)2SO4; (b) 225 g of a solution that is 0.65 m in Na2CO3, starting with the solid solute; (c) 1.20 L of a solution that is 15.0% Pb(NO3) 2 by mass (the density of the solution is 1.16 g/mL), starting with solid solute; (d) a 0.50 M solution of HCI that would just neutralize 5.5 g...
describe how the boiling temperature of a refluxing liquid compares to its boiling temperature when mixed with a dissolved solid or a miscible liquid or an immiscible liquid; describe the same for a liquid without boiling reflux