100 mL volumetric flasks (3) 1 mL pipet (2) Instrumentation (See Appendix for Operating Instructions): PTI Spectrofluorometer with FELIX data system . Solutions available (1) 1.25 M H 2 SO 4: pour out less than 5 mL, only 1 mL is needed. (2) 1.0 x10-4 M quinine prepared in 1.25 M H 2 SO 4: measure out about 15 mL in a small beaker.
The accuracy limits for USP compliant volumetric flasks are stricter than flasks conforming to ISO 1042 and therefore satisfy the requirements of the United States Pharmacopoeia (USP). The volume measured for the corresponding volumetric flask, the measurement uncertainty and the day of issue are documented on this certificate.
A student has 100. mL of 0.400 M M CuSO4(aq) and is asked to make 100. mL of 0.150 M CuSO4(aq) for a spectrophotometry experiment. The following laboratory equipment is available for preparing the solution: centigram balance, weighing paper, funnel, 10 mL beaker, 150 mL beaker, 50 mL graduated cylinder, 100 mL volumetric flask, 50 mL buret, and distilled water.
Density 7 50 mL volumetric flask 1. Weigh your dry 50 mL volumetric flask on a balance at your lab bench and record the mass. For all subsequent measurements with this flask use the same balance. 2. Add 50.00 mL of water (tap water is fine) to the flask. There is a mark on the neck of the flask: the bottom of the meniscus should be at this line.
Use the mass shown by ? x (molar mass CuSO4.5H2O/molar mass CuSO4) = this you weigh out, place it in a 100 mL volumetric flask, add a a little distilled water, swirl until all of the CuSO4.5H2O is dissolve, then add distilled to the mark on the volumetric flask, stopper, mix thoroughly, label. Done.
Jul 26, 2019 · Work out 5 percent of 200, i.e., 0.05 × 200 = 10. To make a 10 percent salt solution, work out 10 percent of 200 and so on. You can also work this out by re-arranging the formula, but multiplying the final volume by the decimal form of the percentage is simpler.
Collect 100 mL of D.I. water and measure the pH. Record the pH in your lab notebook. Collect a 25 mL volumetric flask from the front counter. Using a graduated 1.0 mL pipette, the 25mL volumetric flask and either the acid or base, perform four serial dilutions using 0.5 mL of stock solution at each step.