Bottle labeling

An old bottle labeled Standardized 6.0 m NaOH was found at the back of a shelf in the stockroom. Over time, some of the NaOH had reacted with the glass and the solution was no longer 6.0 M. To determine its purity, 5.0 mL of the solution was diluted to 100. mL and titrated to the stoichiometric point with 11.8 mL of 2.05 M HCl(aq). What is the molarity of the sodium hydroxide solution in the bottle ... 

Put 1 cup plain yogurt and 5 Tbsp. of elder blossoms in a pan. Simmer gently for 30 minutes. Turn off heat and allow to sit 5 hours. Reheat and add 3 Tbsp. honey. Whirl the mixture in a blender. Bottle, label and store in the refrigerator. This is deep cleansing and excellent for removing make-up. 

A bottle labelled as 12% acid in aqueous methanol, and probably two years forgotten, exploded in storage, breaking adjacent bottles[l]. Trichloracetic acid is known to be more unstable, with respect to carbon dioxide and chloroform, in aqueous solution than pure. The reaction usually requires either heat or base catalysis [2], Storage of trichloroacetic acid at less than 30% concentration is not advised [3], Hydrolysis of the trichlorogroup is also conceivable, which would yield intermediate oxalyl monochloride, which habitually breaks down to give carbon monoxide, dioxide and hydrogen chloride. 

Aqueous chromium waste must be bottled, labeled, and given to the waste management technical personnel. 

Weigh all the ingredients separately. Iodine must be finely subdivided. Place the iodine in a glass mortar, add alcohol drop wise, and triturate until the iodine is reduced to a fine powder. Then add boric acid and lactose by geometric mixing until the alcohol evaporates. Dry the powder for about twenty minutes in the air and then pass through a 40 mesh sieve to break all the lumps. Transfer the powder into a wide-mouthed, four-ounce bottle. Label appropriately as Compounded Powder with the instructions of Apply to affected area twice daily as directed. ... 

Another word often used in a similar context is the word assay. If a material is known by a particular name and an analysis is carried out to determine the level of that named substance in the material, the analysis is called an assay for that named substance. For example, if an analysis is being carried out to determine what percent of the material in a bottle labeled aspirin is aspirin, the analysis is called an... 

What does insoluble matter in the general analysis report on a chemical bottle label refer to ... 

If not already done, set up a titration unit as indicated on page 4 of the Metrohm Model 703 Ti Stand Instructions for Use manual, and an exchange unit as indicated on pages 72 and 73 of the Metrohm Model 701 KF Titrino Instructions for Use manual. Place titrant in a bottle labeled titrant. Place methanol in a bottle labeled solvent. Make sure both bottle caps are tight. Switch on the instrument. 

Hydrobromic acid is stored and shipped in drums, tanks, carboys, or bottles, labeled as corrosive materials. The anhydrous gas is stored and shipped in cylinders under its vapor pressure. 

Offset lithography is the most common process used for printing on paper. It is used for folding carton stock and for can and bottle labels. Most lithographic presses are sheet fed, although there are some web-fed presses. A particular application of offset lithography is the printing of flat metal sheets that are then... 

Containers. Keep chemicals in glass jars and bottles. LABEL THEM ALL CLEARLY. 

Were all bottle labels complete (ID, date, time, signature, preservative, etc.) Yes No... 

Did all bottle labels agree with the chain-of-custody form Yes No... 

Sometimes a measurement involves a single piece of calibrated equipment with a known measurement uncertainty value o, and then confidence limits can be calculated just as with the coin tosses. Usually, however, we do not know o in advance it needs to be determined from the spread in the measurements themselves. For example, suppose we made 1000 measurements of some observable, such as the salt concentration C in a series of bottles labeled 100 mM NaCl. Further, let us assume that the deviations are all due to random errors in the preparation process. The distribution of all of the measurements (a histogram) would then look much like a Gaussian, centered around the ideal value. Figure 4.2 shows a realistic simulated data set. Note that with this many data points, the near-Gaussian nature of the distribution is apparent to the eye. 

Unknowns are in dropper bottles labeled A, B, and C. They may include an alkane, an alkene, or an aromatic compound. 

Your lab ran out of 0.05 N HC1. You found a bottle labeled 0.05 N H2S04. Could you use it for your titration If you do, would your calculation of urease activity be different ... 

Step 8. Mix the dissolved sample. Measure its volume and record it. Relate the initial dried sample weight to this volume. Close the bottle, label its content, and save the solution for the determination of radio-strontium (Experiment 13). 

A student found an old bottle labeled thymol on the stockroom shelf. After noticing a pleasant odor, she obtained the following mass, IR, and NMR spectra. The NMR peak at 54.8 disappears on shaking with D20. Propose a structure for thymol, and show how your structure is consistent with the spectra. Propose a fragmentation to explain the MS peak at mJz 135, and show why the resulting ion is relatively stable. 

Copper can form two different oxides copper(II) oxide, CuO, and copper(I) oxide, Cu20. Suppose that you find a bottle labelled copper oxide in the chemistry prep room. 

The bottle label is also compostable but the cap is not at the moment. BIOTA is currently researching biodegradable options for the cap. 

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