Labs

What are the colors of the color wheels? L2

Red Orange Yellow Green Blue Violet

Significant figures of volumetric flask/pipette, graduated cylinder? L2

2 after decimal

To acquire absorption data for standard solutions…make sure that… (L2)

click on Sensors, Data Collection, Events with Entry, set name to Concentrationa and units to micromolar. make sure that wavelength is set at max wavelength of stock dye

beer’s law L2

absorbance = (molar absorption)(concentration)

What is the FS for L2? (3 “create…”)

\-create dilutions of dye

\-create absorption spectrum of each concentration at stock lamdamax

\-create beer’s plot comparing absorptoin to concentration

What is the OI for L2?

\-create absorption spectrum for Gatorade

\-identify dye present

\-find prediceted concentration by plugging in absorptoin to Beer’s Plot line

What is the FS Objective for L3?

\-determine reaction order and optimal concentrationof NaOH and Crystal Violet

\-use tenfold serial dilutions of NaOH

What is OI objective for L3?

\-determine reaction order and optimal concentration of bleach and dye

\-create tenfold serial dilution of bleach

For L3, what must be modified to LabQuest3?

change from full spectrum to time based, 24 minutes, interval 0.5min/sample, change wavelength to lamdamax of dye

zero, first, second order equations

\-\[At\]=\[A0\]-kt

\-ln\[At\]=ln\[A0\]-kt

\-1/\[At\]=1\[A0\]+kt

for L3, how do you identify the reaction order?

based on which graph across all concentration had the highest R^2

for L3, how do you determine the optimal concentraiotn?

whichever concentraiotn had graphs that had most spread out points and greatest range in data