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A 10.0 mL sample of aqueous HCl requires 28.5 mL of 0.12 M NaOH to reach the endpoint. What is the molar concentration of HCl? The equation for the reaction is: HCl+NaOH NaCl + H2O
what is the pH of a solution prepared by dissolving 4.5 g HCl in water to make 410 mL of solution?
How many grams of aspirin were lost in the washing process you used to purify your product, assuming you used 50mL of water for washing? The solubility of aspirin in water is 0.33g per 100mL at room temperature.
How much 1.0 M NaOH must be added to a 100 ml of 10 mM H3PO4 to raise the pH of the solution to 7.0? B) If 2 volumes of 2.0 M Na2HPO4 are added to 1 volume of 0.1 M H3PO4, what is the pH of the resulting phosphate buffer?
A 2.721 gram sample containing an unknown amount of arsenic trichloride and the rest inerts was dissolved into a NaHCO3 and HCl aqueous solution.
If a solution containing 61.402 g of mercury(II) perchlorate is allowed to react completely with a solution containing 17.796 g of sodium sulfate, how many grams of solid precipitate will be formed?
Include in your explanation from which C and in what form the H would have to leave: [H+, H(with one electron), H(with two electrons)].
Consider the combustion of ethylene, C2H4(g) +3O2(g)---> 2CO2(g) + 2H2O(g). If the concentration of C2H4 is decreasing at the rate of 0.37M/s
Choose the answer which presents the chemical formulas for two substances in order of decreasing melting point (highest melting point first) and gives a valid reason for this order.
Calculate the concentration of a NaOH solution if 0.1379 g of succinic acid (H2C4H4O4, 118.09 g/mol) requires 12.4 mL of NaOH solution
Calculate the work done (in Joules) when 33.3g of tin dissolves in excess acid at 1.04 atm and 22 degrees C. Assume ideal gas behavior.
Calculate the amount of heat transferred when 45.0 g of CH3OH(g) is decomposed by this reaction at constant pressure.
A chemical firm was hired to monitor a nearby lake for possible mercury contamination. Several samples were taken at different locations around the lake, including water samples.
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