Which of the following is a properpractice in transferring a certainvolume of a liquid reagent from itsreagent bottle to your owncontainer? *Hold the reagent bottle in such a waythat the palm of your hand covers thelabel of the reagent bottle.Use a clean and dry pipet or a graduatedcylinder to measure the right amount ofvolume you need, then proceed totransfer the liquid to your container.If the reagent bottle comes with adropper, use the dropper to get the rightamount of liquid you need while makingsure that after using the dropper, it isthen placed directly at the back of thebottle.all choices are correct

We are to discuss the correct method of transferring liquid from reagent bottle to our own…

Answered: Which of the following is a proper…

Principles of Instrumental Analysis

7th Edition

ISBN:9781305577213

Author:Douglas A. Skoog, F. James Holler, Stanley R. Crouch

Publisher:Douglas A. Skoog, F. James Holler, Stanley R. Crouch

Chapter33: Automated Methods Of Analysis

Section: Chapter Questions

Problem 33.6QAP

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TRUE OR FALSE __________ 11. The minimum number of centrifuge tubes in a centrifuge machine during its operation is one. __________ 12. Never place reagents directly onto the weighing pan of a balance, always use weighing paper, a beaker, or some other container. __________ 13. To transfer a solution, the stirring rod touches the delivery point of the reagent vessel and the wall of the receiving vessel. __________ 14. An open flame is the heat source for heating or evaporating flammable liquids. __________ 15. Most chemicals used in experiments can be discarded into the sink.
How would you prepare 75 mL of an H2SO4 solution at 20% in weight (density=1.1394 g/mL, richness=227.9 g/L) starting from the commercial H2SO4 solution (98%, density=1.8361 g/mL, richness=1799 g/L)? Please choose among the most appropriate procedure which better describes the preparation of the previous diluted H2SO4 solution: Select one or more: a. Take the required volume of commercial H2SO4 solution with an adequate pipette, pour it into a graduated flask and add water up to the final volume (75 mL in this case). Homogenize the flask by stirring it gently. b. Take a beaker and put about 40 mL of distilled water. Then take the required volume of commercial H2SO4 solution with an adequate pipette and pour them over the beaker. Let the solution be warm and pour the mixture into a graduated flask and add water up to the final volume (75 mL in this case). Homogenize the flask by stirring it gently. c. Take a beaker and put about 40 mL of distilled water. Then take the required volume…
Volumetric pipettes are designed to deliver a precise amount of liquid, but only if you a. submerge the end of the pipette into a solution you are delivering. b. allow the pipette to drain freely, and leave any residual solution in the pipette. c. hold the pipette at a 45 degree angle and ensure that all the liquid is delivered.
which is an active ingredient of a fumigant insecticide that turns directly from solid to toxic vapor xylene, anthracene, biphenyl, naphthalene
Which part of the GC equipment does separation takes place?
dont provide handwritiing soution ...
A chart is prepared by plotting In Ksp versus 1/T, using data obtained by performing a lab experiment. Refer to the attached photo for reference on how to solve these equations. Particularly #5 should be useful: A linear fit of the data in the chart yields the equation y = (-5.0020x10^3)x+(2.100x10^1) with an R2 value of 0.9922. Determine the enthalpy (deltaH in kJ) associated with dissolving KNO3. Answer in scientific notation with appropriate sigfigs.
Make a schematic diagram for the procedure below: A. Constant weighing of the crucibles Bring two porcelain crucibles to constant weight by heating to redness for 15 min over a burner (not including the cover; see Figure 1 for heating set-up). Cool the crucibles briefly on clean Al foil-covered wire gauze at room temperature for 5 min and into the desiccator for 25 minutes. Weigh each crucible accurately on an analytical balance. Repeat procedure a and b until two successive weights agree within ± 0.3 mg, be sure that all oxidizable substances on the entire surface of each crucible have been burned off.
Can elastic hose use for pumping and transferring concentrated solution of CH3COOH for long time? If not let explain why and propose at least two types of material which are properly used in this case.
(a) Water in vadose zone contains chlorobenzene of concentration 40 mg/L. What is the equilibrium concentration soil air in contact with this solution? (b) An aquifer with porosity 0.3 has distribution coefficient of TCE as 100 L/kg. What fraction of TCE is in aqueous phase and sorbed phase of the soil?
It is desired to determine the molecular weight of an organic compound known to be volatile. For this, a glass balloon with a full volume of 152 mL is weighed and the weighing result is recorded as 215 g. Then, the organic compound that is desired to have some molecular weight in liquid form is added into the balloon and evaporated in a water bath until dryness. After the steam temperature is measured as 90 °C, the balloon is left to cool and the organic compound in the balloon condenses again. The balloon is then weighed again and recorded as 215,367g. Find the molecular weight of this organic compound since the pressure of the environment where the experiment is performed is 700 mmHg.
- The major objective of a roasting process is to eliminate the Sulphur contained in the concentrate andto provide a calcine. In a roasting plant, 1000 kg per hour of molybdenum(IV) sulphide (MoS2) is roastedwith 25 % excess air to obtain MoO3 calcine in a chamber-type roasting furnace. Preheated air entersthe reactor at 400 K while MoS2 enters at room temperature. After the process, the waste gases leavethe reactor at 1000 K, and the calcine leaves at 850 K.a) Draw process flowsheet and heat balance diagram (ref. temp is 298 K) b) Calculate the amount of off-gas per hour in moles. c) Calculate the amount of calcined MoO3 per hour in kg.

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