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Twenty-five mL of 0.150 M hydrofluoric acid, HF, is titrated with 0.100 M potassium hydroxide.
What is the pH of the acid initially (before any base is added)?
What volume of potassium hydroxide must be added to reach the equivalence point?
What is the pH of the solution at the halfway point of the titration (halfway to the equivalence point)?
What is the pH of the solution at the equivalence point?
Plot the titration curve. Make sure you have enough data points to draw your curve. (Need extra help here!)
What indicator would you choose for this titration? What color change would you observe with the chosen indicator? Explain your choice.
Acid-catalyzed dehydration of cyclobutylmethanol proceeds via an E1 mechanism and gives two alkenes.
A diver at a depth of 100 ft (pressure approximately 3 atm) exhales a small bubble of air with a volume equal to 100 mL. What will be the volume of the bubble (assume the same amount of air) at the surface?
Determine the mass of copper(II) sulfate, CuSO4 will remain after removing all the H2O(water) from 74 grams of CuSO4 5H2O (Also called Blue Vitriol and Bluestone)?
1) Many household cleaning products contain oxalic acid H2C2O4, , a diprotic acid with the following dissociation constants: Ka1=5.9E-2 and Ka2=6.4E-5 Calculate the equilibrium concentration of C2O4^2- in a 0.20 M solution of oxalic acid
an unknown gas sample is collected in a 255 ml countainer at 25c and 755 mm hg. how many moles of gas are present?
What is the pH of an 85 mL solution containing .215 M NaHCO3 and .203 M Na2CO3?
Calculate the heat energy released when 13.3 g of liquid mercury at 25.00 C is converted to solid mercury at its melting point. Constants for mercury at 1 atm
Converting Grams and Moles, To do this assignment, use your calculator to do the calculations required. Then invert the calculator to read the message word. Insert the message word into the appropriate space in the statement
For a given sample of {rm CH_3OH}, the enthalpy change on reaction is 19.0 kJ. How many grams of hydrogen gas are produced?
The volume of a mass of gas is 950 ml at 700 torr pressure. What volumw will it occupy at 350 torr,the temperature
Consider a nitrite (NO2-) analysis for rainwater samples. Gas chromatographic (GC) vs. spectrophometric approaches were compared with the following results as means?
From your previous knowledge of the tendencies of certain metals to rust or tarnish, and from your reading in this experiment, select at least three metals from the following list which are quite active, three which are moderately active,
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