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A solution of ethanol (d=0.795 g/mL) and water is prepared by placing 30.0 mL of ethanol in a 250.0 mL volumetric flask and diluting with water to the flask etched mark.
What is the molarity of the ethanol?
next, 25.0 mL of the solution above is diluted to a final volume of 500.0 mL. What is the new molarity of the diluted solution?
to heat 236ml of water from 25 degrees celcius to 78 degrees celcius in 2.00 minutes what must be the heat rating of
Magnesium sulfate, MgSO4, is added to 461 mL of 0.030 M sodium hydroxide, NaOH, until a precipitate just forms. How many grams of magnesium sulfate were added?
Nitrous acid, HNO2, is a weak acid that is partially dissociated (broken apart) in aqueuous solution. What is the equilibrium concentration of HNO2 if the extent of dissociation in 2.00M HNO2 is 0.58%. The equilibrium equation is shown below.
Suppose your thermometer read consistently 1.0 o C lowered throughout both parts in the colligative properties lab. What effect would that have on your experimental value for the molar mass of your unknown solute?
Above what temperature, in °C, will the following reaction become spontaneous? Assume free energy, enthalpy, and entropy are not temperature dependent.
Explain why gas chromatography usually ramp(increase) the oven temperature during an analysis
A solution is 40% acetic acid by mass. The density of this solution is 1.049 g/mL. Calcu late the mass of pure acetic acid in 480 mL of this solution at 20 C
calculate the molarity of the following solutionsa5.6 mol of sodium chloride dissolved to form 25 l of solution.b5.6 g
What mass of NaN3(s) must be reacted in order to inflate an air bag to 74.6 L at STP?
When the following epoxide was treated with aqueous acid or base respectively, a pair of isomers were produced. Complete the following reactions explain the formation of each product with a mechanism (include all intermediates formal charges and c..
What is the enthalpy change corresponding to the melting of 2.5 moles of H2O? What is the system? What is the surrounding?
using equations explain how a buffer functions. buffers consist of a solution of a weak acid ha and its conjugate base
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