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0.1M HCl is added into a mixture of 25mL of water and 25mL of Ca(OH)2. For the end point to be reached in the first test 1.5mL of 0.1M HCl is added into the mixture. The second time, 1.3mL is added to reach the end point. How would I calculate the molarity of the hydroxide ion (OH-) for the two tests?
This aqueous mixture then reacts with excess aqueous lead (II) nitrate to form 21.75g of solid. Determine the mass percent of sodium chloride in the original mixture?
Calculate the mole fraction of ethylene glycol in the solution.
calculate [OH-] and pH in a solution in which dihydrogen phosphate ion, H2PO4- is 0.335M and hydrogen phosphate ion, HPO4^(2-) is a)0.335M b)0.100M
In countries where potassium iodide is added to salt, iodine deficiency or goiter has been almost completely eliminated. The recommended daily allowance (RDA) for iodine is 150 pg/day.
The following molecules (ax4y2) all have an octahedral geometry. Select the pairs that contain identical molecules
a liquid unknown was found to be inslouble in water & soluble in cyclohexane & alcohol; the unknown was found to have a boiling point of 58 degress celsius at 670mm Hg. What is the substance? What could you do to confirm your answer?
The partial molar volumes of water and ethanol in a solution with x(H2O) = 0.40 at 25 degrees C are 16.9 and 57.5 cm^3/mol, respectively.
Tums calcium carbonate reactswith stomach acid ( HCI) according to the reaction below. One tablet of tums contains 500.0 mg CaCO3. If one tablet of tums is addedto 20.0 mL 0.100M HCI, how many grams of CO2 gas are produced?
What is the contribution to the internal energy from translations for an ideal monatomic gas confined to move on a surface?
Calculate the mass of water vapor produced when 6.00 L of propane (C3H8) gas undergo complete combustion at a temperature of 250C and a pressure of 1.00 atm.
The united states food and drug administration requires that any product called vinegar contain at least 4% of weight by acetic acid .Assuming that the density of vinegar is the same as water, does this satisfy the FDA requirement to be called vin..
Explain why the C=C stretching mode gives rise to a rather weak IR band in 1-methylcyclohexane, while in its isomer
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