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Question 1) How much NaOH would you need to dissolve in water in order to prepare 1.50 L of a NaOH solution in which [OH-]=0.65 M?
Question 2) The venom of biting ants contains formic acid, HCOOH (Ka=1.80*10^-4 at 25 C). What is the pH of a 0.0065 M solution of formic acid?
Why was the titration performed by the addition of permanganate solution to oxalate solution and not the other way around? Why was the experiment performed at an elevated temperature?
A student heated 1.0L of ethanol (density 0.789 g/L) with 1.0 mL ethanoic acid (density 1.049 g/mL) with a sulfiric acid catalyst and noticed a vinegar-like smell to the product as well as a fruity medicinal smell.
5.00 ml of a water sample was titrated for hardness with 4.15mL of 0.0200M EDTA. Write an equation for the reaction and calculate the hardness of the water in ppm
How much energy (in kilojoules) is released when 13.4 of steam at 122.5 is condensed to give liquid water at 71.5? The heat of vaporization of liquid water is 40.67 , and the molar heat capacity is 75.3 for the liquid and 33.6 for the vapor
Explain how can you determine whether one of these two suspected compounds was identical to the unknown compound without using any for of spectroscopy.
Assuming a 75% recovery of the volume from the first filtration, what volume of cation solution will be used in part B of the procedure? (Hint: you started with 100ml and added NaOH)
Calculate how many milliliters of 0.100 M HCl shoule be added to how many grams of sodium acetate dihydrate (NaC2H3O2 x 2H2O) at 5 degrees C to prepare 250.0 mL of a 0.100 M buffer at a pH=5.00. At 5 degrees C
A 0.140-mole quantity of NiCl2 is added to a liter of 1.20 M NH3 solution. What is the concentration of Ni2 ions at equilibrium? Assume the formation constant* of Ni(NH3)62 is 5.5 × 108.
Using the fact that on the surface of the Earth, where g is constant, 1 kg has a weight of 2.2 lbs, find your mass in kg. C) Convert your height in feet and inches into meters (1 ft = 30.48 cm; 1 in = 2.54 cm).
A solution of ammonia and water contains 4.70×10^25 water molecules and 7.80×10^24 ammonia molecules. How many total hydrogen atoms are in this solution
A this lead apron is used in dental offices to protect patients from harmful x rays if the she measures 75.0 cm by 55.0cm by 0.10 cm and the density of lead is 11.3 g/cm what is the mass of the apron in grams
Determine the volume of a 0.510 M KMnO_4 solution required to completely react with 2.90 g of Zn.
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