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Titration with an indicator is a common technique that chemists use when counting moles.
a ) Would this technique be useful for determining the pH of a water sample from a lake or stream?
b) Can this technique determine if a lake or stream is affected by acid rain?
A 45.5 g sample of copper at 99.8 degrees celsius is dropped into a beaker containing 152 g of water at 18.5 degrees celsius. What is the final temperature when thermal equilibrium is reached?
How can electromigration be used as property for separation?
What is the percent yield in a reaction between 53.6 g O2 and 51.6 g Al if 87.3 g of Al2O3 is produced
In writing a lab report, a hypothesis is needed. The experiment called for a titration HCl solution of unknown molarity with TRIS base. Bromocresol green was used as an indicator.
Consider the following equalibrium: 4NH3(g) + 3O2(g) 2N2(g) + 6H2O(g). Suppose 0.30 mol of NH3 and 0.40 mol of oxygen are added to a 5.0-l container. If x mol of water is present at equalibrium, how many moles of ammonia will remain at equalibri..
a sample of Ringer's solution contains the following concentractions (mEq/L) of cations: Na 147, K 4 and Ca2 4. If CI- is the only anion in the solution
Physiological saline solutions used for intravenous injections have a concentration of 0.90% NaCl by weight
Calculate the solubility (in grams per 1.00 102 mL of solution) of magnesium hydroxide in a solution buffered at pH = 10.
Vapor pressure of pure acetone (propanone) is 266 torr. When a non-volatile solute is added, the vapor pressure of acetone above the solution falls to 232 torr. What is the mole fraction of acetone in solution?
What would the ph be of a mixture of 100 ml each of 0.01 M of NaH2PO4 and 0.01 MNa2HPO4
Calculate the equilibrium concentration of each substance in the reaction. b.) Calculate the equilibrium constant for the reaction.
At 0.0oC, if the volume of air is 2.9 mL and the pressure of the atmosphere that day is 675 mmHg, what is the number of moles of air?
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