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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.
The vapor pressure of CCl4 (MM = 153.81g/mol) at 65 degree celsius is 504mmHg. How many grams of C10H8 (MM= 128.2gmol) must be added to 25.00g of CC4 so that the vapor pressure of CCl4 is 483mmHg?
Based on the solubility rules, which one of these is insoluble in water?
The temperature of the water rose t oa final temperature of 27.84 C. Neglecting heat loss to the room and the heat capacity of the beaker itself, what is the specific heat of the alloy?
what volume of 420 ml of hydrogen occupy if the temperature is raised from 0 C to 95 C?
You need to produce a buffer solution that has a pH of 5.38. You already have a solution that contains 10. mmol (millimoles) of acetic acid.
Phosgene (COCl2) is a toxic substance that forms readily from carbon monoxide and chlorine at elevated temperatures: CO (g)+ Cl2 (g) ? COCl2 (g).
what volume of methane, measured at STP, must be burned? (ΔH°combustion for CH4 = -891 kJ/mol)
What is the percent by mass of NaHCO3 in a solution containing 10 g of NaHCO3 dissolved in 300 mL of H2O
Assume that the heat required for the vaporization of the alcohol comes only from the aluminum block and that the alcohol vaporizes at 25°C.
Two students measure the density of gold. One works with a 100-g bar of pure gold. The other works with a 200-g bar of pure gold. Which student measures the larger density.
A solution is made by mixing 12.0g of NaOH and 70.0mL of 0.200m HNO3. Calculate the concentration of OH- ion remaining in the solution.
Chlorine will spontaneously react with iodide to produce chloride and iodine.
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