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a student carried out the experiment but did not follow the directions exacly as written. What effect would the following actions have on the experiment ?
a. The student took a sample of the vinegar with a 5ml voluetric pipet and then emptied all the liqui into an Erlenmeyer flask by blowing out the sample.?
b. Air was not excluded from the buret when it was filled NaOH solution. An initial buret reading was taken then during the titration, the air bubble came out. When the titration reached the end point, a final reading was taken .???
c. The titration went to a purple end point.
Fluorine reacts with oxygen to yield oxygen difluoride. 2 F2(g) + O2(g) 2 OF2(g) What is the value of K if the following concentrations are found at equilibrium: [O2] = 0.200 mol/L, [F2] = 0.0100 mol/L, and [OF2] = 0.0633 mol/L.
a 1 l buffer solution with ph 9.05 is desired. one of the two ingredients of the buffer is hcn. what could the other compound be? Suggest a suitable ratio and determine the exact moles of the two compounds to achieve the desired pH.
What molar ratio of sodium acetate to acetic acid should be used to prepare a buffer with pH = 4.5? Ka acetic acid = 1.8 x 10-5.
Discuss the differences observed in the IR and NMR spectra of 3-nitrophthal-hydrazide and luminol that are consistent with reduction
The total concentration of enzyme in the reaction was 10 mmol/mL. What is thekcat (K2) of this reaction?
In terms of uncertainty, why is an endpoint volume of 9 mL less preferred than an endpoint volume of 35 mL? In terms of uncertainty, why is an endpoint volume of 55 mL less preferred than a volume of 35 mL?
what is the chemical equation that describes both these reactions? Please give the chemical equations of what happens in this situation
A 248 mL gas sample has a mass of 0.436 g at a pressure of 753 mm Hg and a temperature of 27 degrees celcius.what is the molar mass of the gas
Describe two independent methods for determining the atomic mass of an element. Explain how these method are truly independent.
What is the difference in water solubilities of fumaric and maleic acid? Which one is more water soluble?
Calculate the concentrations of each ion present in a solution that results from mixing 49.6 mL of a 0.20M NaClO3(aq) solution with 25.3 mL of a .20 M Na2SO4(aq). Assume that the volumes are additive.
5.0 g of H2O at 23.0 oC is added to 100.0 g of H2O at 67.5 oC. What is the temperature of the resulting mixture
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