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A 10.0 mL sample of vinegar, which is an aqueous solution of acetic acid, CH3COOH, requires 16.5 mL of a .500 M NaOH solution to reach the end point in a titration. what is the molarity of the acetic acid solution? CH3COOH(aq)+NaOH(aq)>NaCH3COO(aq)+H2O(l)
25.0 mL of ethanol (density = 0.789 g/mL) initially at 5.4°C is mixed with 34.6 mL of water (density = 1.0 g/mL) initially at 25.3°C in an insulated beaker. Assuming that no heat is lost, what is the final temperature of the mixture?
In the ground state of the Hydrogen atom the energy of the electron is E0 = -13.61 eV. What is the energy of the electron in the ground state of the He+ ion
What potential issues might arise if the pH of your buffer is too close to the pI of your protein of interest? Why might an extreme buffer pH ( 9) be unsuitable?
A cetain weak acid, HA, has a Ka value of 1.4E-7 A) Calculate the percent ionization of HA in a 0.10 M solution. B) Calculate the percent ionization of HA in a 0.010 M solution
Calculate the "molar heat of dissolution" (kJ/mol). Recall heat capacity of water is 4.184 J/g degrees celsius.
A graduated cylinder contains 133 mL of water. A 17.0 g piece of iron (density = 7.86 {g/cm^3}) and a 23.0 g piece of lead are added. What is the new water level in the cylinder?
Calculate the molarity of a solution made by dissolving 12.5 grams of Na2CrO4 in enough water to form exactly 550 mL of solution.
Which of the flasks contains the least total ion concentration?
Calculate the volume of the gas, in liters, if 1.65 mol has a pressure of 0.995 atm at a temperature of -4 degrees Celsius. Calculate the absolute temperature of the gas at which 3.13 x 10-3 mol occupies 335 mL at 760 torr.
Methane has a Henry's Law constant (k)of 9.88 × 10-2 mol/(L·atm) when dissolved in benzene at 25°C. How many grams of CH4 will dissolve in 3.00 L of benzene if the partial pressure of CH4 is 1.48 atm?
What is the equivalent mass of metal that is dissolved in sulfuric acid during hydrogen release if 2.27 g metal reacts with 30 ml 33 w/w% H2SO4 (density 1.25 g/cm^3,
What is the molar mass of this substance, express your answer in g/mol and determine the moloar concentraitions Cr 2 O 7 ^2 and of K + ?
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