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Potassium chlorate, when heated in the presence of a catalyst, MnO2, generates oxygen gas and potassium chloride solid residue. If the oxygen generated by completely heating 5.00 g of potassium chlorate is trapped in a container over water, where the total pressure of the trapped gases is 1.00 bar, what will be the volume of the trapped gases? Assume a temperature of 25oC. You will need to refer to a table of water vapor pressures at various temperatures in order to complete these problem (e.g., CRC tables). [V = 1.567 L]
What is the volume in mL of 0.585 M HCl(aq) needed to reach halfway to the equivalence (stoichiometric) point in the titration
Briefly explain why it was not necessary for you to determine the mass of unknown liquid that you transferred to the flask before heating.
You have 500.0 mL of a buffer solution containing 0.20 M acetic acid (CH3COOH) and 0.30 M sodium acetate (CH3COONa). What will the pH of this solution be after the addition of 20.0 mL of 1.00 M NaOH solution? [Ka = 1.8 ´ 10-5]
What is the value of the equilibrium constant for the reaction between I2 (s) and Br- (aq) at 25 degrees celcius?
A precipitate again formed and was filtered off. Finally, the solution was treated with a sodium carbonate solution, which resulted in no precipitation. Which metal ions were definately present, which were definately absent, and which may or may n..
Urea (NH2CONH2) an important nitrogen fertilizer is produced industrially by the reaction 2NH3(g)+CO2(g)--->NH2CONH2(aq)+ H2O(l) given that ?G^degree = -13.6KJ, calculate ?Gat 298K for the following sets of conditions
Estimate the vapor pressure of sea water at 20 degrees celsius given that the vapor pressure of pure water is 2.338 kPa at that temperature
What is the molarity of a solution prepared by dissolving 13.1 g of glucose (of MW 180 amu) in 217 mL of solution?
A 397 mL container holds 0.146 g of Ne and an unknown amount of Ar at 35°C and a total pressure of 639 mmHg. Calculate the moles of Ar present
Calculate the standard reaction entropy and the change in entropy of the surrounding at 298 K for the reaction below. Also calculate the standard Gibbs for this reaction as well is this reaction spontaneous
What volume 0.100 M NaOH will react completely with 25.00 mL of 0.100 M HCl?
In an acid-base titration experiment, 50.00 mL of a 0.0500 M solution of acetic acid (ka=1.75 x 10^-5) was titrated with a 0.0500 M solution of NaOH at 25 degree C
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