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A water scientist determined the concentrations of calcium and magnesium ions in a sample by titration with 0.06500 M EDTA. Two 50.00-mL portions were taken. The first titration was carried out at pH 10.00 and required 19.54 mL of titrant to reach the end point. The second 50.00-mL sample was adjusted to pH 12.00 with KOH to precipitate the magnesium ions as Mg(OH)2. The supernatant required 12.82 mL of titrant to reach the end point. What are the concentrations of calcium and magnesium ions in the original water sample?
When a particular metal is illuminated with photons, one electron is observed for each absorbed photon. What effect would decreasing the wavelength and number of photons, have on the electrons leaving the surface. Please show all work.
What is the relationship between the products formed when (R)-3-methyl-1-pentene is reacted with HBr? Question 15 options: Constitutional isomers Diastereomers Enantiomers Meso compound
Compound XF3, where the identity of X is unknown, consists of 64.8% F by mass. What is the atomic weight of X?
A certain weak acid HA, has a value of 9.7×10?7.Calculate the percent ionization of HA in a 0.10 m solution. Calculate the percent ionization of HA in a 0.010 m solution.
What is the concentration of OH- in a solution that contains 0.225g of NaOH in 0.250L of solutio.
to make a phosphate buffer at ph 9.6 starting with 1l of 10 mm phosphoric acid h3po4 pks are of 2.15 6.82 and 12.38
The concentration of HCl in a bottle was determined as follows: •3.00 mL of the acid were diluted to 250.00 mL •102.40 mL of the diluted acid were titrated with 0.08212-M NaOH
Explain why the wild horse analogy can be used to help explain a certain type of chemical bonding
What are the equilibrium partial pressures? Nitrogen dioxide decomposes according to the reaction given below where Kp = 4.48 x10^-13
How will you prepare the following solutions (80 mL of .10 M HC2H3O2) and (80 mL of 0.10 M NH3) from a 6.9 solution of acetic acid and ammonia using a 10mL graduated cylinder
Determine the freezing point (°C) of a 0.015 molal aqueous solution of MgSO4. Assume i = 2.0 for MgSO4. The molal freezing-point-depression constant of water is 1.86 °C/m..
In the reaction of 3-methyl-2-butanol and HBr, determine the products that would be made. Explain why the experiment will not be as successful for production of an alkyl bromide as the reaction of 1-butanol with HBr.
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