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In a strong acid-strong base titration at room temperature, the pH at the equivalence point is 7. The indicator Bromophenol Blue changes color over the pH range of 3.0 to 4.5. Explain why it is okay to use this indicator for this titration.
Hydrogen gas can produced in the laboratory through the reaction of magnesium metal with hydrochloric acid. What is the volume, in liter, of H2 gas produced at 24°C and 835 mmHG, from the reaction of 12.0 g of Mg
an analytical chemist has determined by measurements that there are moles of magnesium in a sample of talc. how many
What is the mass in grams for each of the following: a) 5.12 mol of Al, b) .75 mol of Cu, c) 3.52 mol of MgBr2, d) 0.145l of C2H6O, e) 2.08 mol of (NH4)2SO4.
Describe the titration curve for the titration of a weak base with a strong acid. Indicate the chemical reaction, the points that correspond to the equivalence point, the pH = pKa and the region with maximum buffering.
In the first trial of Part A of the procedure, the ratio of moles H20/moles CaSO4 is found to be 1.93. In the second trial the ratio was found to be 1.98. Calculate the relative average deviation of the two trials. Should the student run another t..
In a separate experiment, an empty flask is weighed, 35.3 cm3 of the lubricating oil is poured into the flask and the flask is reweighed. If the scale reading was 124.8 g in the first weighing, what would it be in the second weighing
If 2.50L of 1.25M BaCl2 added to 3.50L of 2.45 M NaCl, what is molarity of Chloride ions in final solution
We add some solid silver chromate (Ag2CrO4, Ksp = 1.100x10-12) to a solution of 1.2202 M Li2CrO4. After equilibrium is achieved, what is the pAg (=-log[Ag+]) of this solution
How many grams of carbon dioxide (CO2) can form when a mixture of 4.95 g of ethylene (C2H4) and 3.25 g of oxygen is ignited. Assume complete combustion to CO2 and H2O.
Consider the fermentation of one molecule of glucose (Glc) to two molecules of lactate (Lac): Glc 2 Lac. Which of the following sets of concentrations would result in the largest release of free energy at 30°C
Soft drinks are bottled under CO2 pressure of 4.0 atm. The solubility of CO2 at 4.0 atm is 0.71g/100g H2O. What is its solubility after the bottle is opened if the partial pressure of CO2 is 4.0e-4 atm
When heating the acetone in a water bath, why must there be a hole in the foil cap
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