2). As indicated in the same table, less resistant stainless grades can be passivated by adding sodium dichromate to the nitric acid bath to make the solution more oxidizing and capable of forming a passive film on the surface. Another option, used in place of nitric acid plus sodium ...
Here's how to make your own disappearing ink: Dissolve the thymolphthalein (or phenolphthalein) in theethyl alcohol. Stir in 90 ml of water (will produce a milky solution). Add sodium hydroxide solution dropwise until the solution turns a dark blue or red (might take slightly more or less...
To set up a titration, you need an Erlenmeyer flask or beaker, an excess amount of solution of known concentration (titrant), a precisely measured amount of analyte (used to make the solution of unknown concentration), an indicator, a calibrated buret (a glass device that allows the precise ...
Calculate the molarity of the acetic acid in vinegar, if a 500ml sample of the vinegar requires 43.50 ml of 0.105 M NaOH to reach a phenolphthalein endpoint in a titration. What is the indicator in the titration with permanganate solution?
20.Pour 75 mL of this solution into a second 250 mL Erlenmeyer flask (flask 2), add 2 drops of phenolphthalein solution, and titrate to the phenolphthalein color change with 0.20 M NaOH. Record the volume of titrant. You now have a solution of a weak acid in flask 1, and a solution...
How can you prepare2∘alcohol usingCH3MgBr? View Solution How can you prepare t-butyl alcohol using CH_3MgBr ? View Solution Exams IIT JEE NEET UP Board Bihar Board CBSE Free Textbook Solutions KC Sinha Solutions for Maths Cengage Solutions for Maths ...
Add 5 drops of phenolphthalein to the milk/whey sample, stir gently. Use syringe to let the NaOH run drop by drop into the sample while stirring gently Continue until a light pink coloring persists for 10-20 seconds Look on the column to see how many ml of NaOH were used ...
approach is to chemically modify the refractive index of the pore fluid to make it match that of the matrix grains, e.g. by adding glycerol. This, however, leads to modifications of the fluid density and viscosity, which is undesirable in experiments of density-dependent flow....
Another approach is to chemically modify the refractive index of the pore fluid to make it match that of the matrix grains, e.g. by adding glycerol. This, however, leads to modifications of the fluid density and viscosity, which is undesirable in experiments of density-dependent flow. ...
If a chemist has a 10 M solution of HCl and wants to make 100 mL of 3 M solution, how many mL of the 10 M solution will she need? Dilution Calculations: A solution of higher concentration known as a stock solution can be ...