What is TBST? a. why is it used? b. Purpose of rinsing and washing steps
In case of any query please comment. If you have liked the solution then please THUMBS UP.
What is TBST? a. why is it used? b. Purpose of rinsing and washing steps
1. Why is it important to chill the water that will be used for rinsing/washing the precipitate 2. In the synthesis of salicylic acid reaction, percent yield 75% - 85% are not uncommon. ( if the percent yiels are much higher it is likely that your product was still wet when you weighed it.) Explain why very high percent yiled (>95%) are not expected in this lab. 3.Compare the melting point ranges of the pure salicylic acid sample and your...
6. Cu metal generated What is removed by the final three washing steps and why? a) washing with water: b) washing with ethanol: c) washing with acetone: What color is the recovered copper? 4. CuO (s) + HCl(aq) → CuCl2 (aq) +_H20 (1) net ionie equation: Observation: turned wwe Reaction Type: What is in the solution after the reaction is complete? 5. Mg(s) +_ CuCl2 (aq) → __Cu (s) + _ MgCl2 (aq) _ Mg(s) + HCl(aq) → H2(g) +...
what is the purpose of rinsing the pipet twice with aliquotes of the saturated Ca(OH)2 solution?
Experimental Procedure, Part A. 4. What is the purpose of rinsing the pipet twice with aliquots of the saturated Ca(OH)2 solution? Experimental Procedure. Part A.4. What is the indicator used to detect the endpoint in the titration for this experiment? What is the expected color change at the endpoint in this experiment? Experimental Procedure. Part A.5. The directions are to read and record the initial volume of the buret to the correct number of significant figures. Explain what this means.
(1) De (2) Wh in water? (3) What is the purpose of washing with water after extraction with a reaction solvent? (4) What is the purpose of using a tared test tube? (5) W (6) What is the purpose of using a porous plate? (7) Why should a piece of weighing paper be put under the porous plate? (8) Why should you not touch the crystals with your fingers? fine: take up, wash with water, drying agent, absorb, mother liquor...
a) Why is the binary numbering system used in microcontrollers? b) What is the purpose of the hexadecimal numbering system?
What is the purpose of the washing with 10% sodium bicarbonate? Explain clearly what aqueous sodium bicarbonate does and how it allow to achieve what is desired. (2 marks)
3. What is the purpose of washing a precipitate? Briefly explain how this is done. 4. In addition to the step-by-step instructions, the flow chart found on the previous page in quite useful in keeping track of the cations during the experiment. Sketch the flow chart so that the scheme is familiar before beginning the exercise.
Why is a galvanometer used in a Wheatstone bridge? What purpose does it serve? Please explain.
What is the purpose of the AMES test ? Why is liver homogenate used ? If you had an opportunity to conduct the test , is there a particular substance that you use or come in contact with daily that you would test? If the substance tested had a positive result would you stop using?