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A sample weighing of .5375 g and containing Na2CO3 (106.0 g/mol),NaHCO3 (84.01 g/mol) as well as inert material dissolved and titrated with.1014 M HCL. The first end point volume phenolphthalein endpoint is 11.58 mL as well as the second end point volume (bromocresolgreen end point is 64.85mL. Compute the weight percentage of Na2CO3.
Find the molecular, ionic, and net ionic equations for the following. Underline all solids. If no reaction occurs, complete the molecular and ionic equations, but wrtie "no reaction" in place of the net ionic equation.
An unknown monoprotic weak acid, HA, has a molar mass of 55.0. A solution contains 2.50 g of HA dissolved 800. mL of solution. The solution has a pH of 2.000. What is the value of Ka for HA
In a first order decomposition in which the rate constant is 0.201 sec-1, how long will it take (in seconds) until 0.131 mol/L of the compound is left, if there was 0.566 mol/L at the start
Assume your unknown sample is 75% KHP, what mass of the unknown sample should you measure in order for your titration to require 20.0 mL 0.105 M NaOH
use standard reduction potentials to find the equilibrium constant for the following reaction at 25 degrees C.
What is the molarity of a solution that was prepared by adding 100ml of 0.225M KBr solution to 500ml of water
a 34.9-g sample of an unknown metal initially at 232.8oc is immersed in a 17.0-g sample of water specific heat 4.184 j
Consider the reaction with the rate law, Rate = k[BrO3-][Br-][H+]2 By what factor does the rate change if the concentration of H+ is decreased by a factor of 3
What would be the speed of the following particles if they had the same wavelength as a photon of green light (? = 500.0 nm)? Proton (mass = 1.673 × 10-24 g) Neutron (mass = 1.675 × 10-24 g) Electron (mass = 9.109 × 10-28 g) Alpha particle (mass =..
if 18.6 of 0.800 solution are needed to neutralize 5.00 of a household ammonia solution what is the molar concentration
Balance the following redox equation using the smallest integers possible and select the correct coefficient for the Mn2+. Mn(s) + Cr2O72-(aq) + H+(aq) ? Mn2+(aq) + Cr3+(aq) + H2O(l)
given two separate solutions 0.100 m ammonia and 0.100 m ammonium chloride calculate the volume of each solution to
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