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Q1. The concentration of Pb+ in sample of wastewater is to be determined by using gravimetric analysis? to a 1000.0 ml sample of the waste water is added an excess of sodium sulfide, forming insoluble lead II sulfide(239.266g/mol) according to the balance equation given below. the solid leadII sulfide is dried, and it's mass is measured to be 0.1209g. what was the contraction of Pb2+ in the original wastewater sample? Pb2+(aq) + Na2S(aq) ---> PbS(s) + 2Na+(aq)
A sample of nitrogen gas with a pressure of 805 Torr and a temperature of 25.0°C was cooled to 13.3 °C. What is the final pressure of the gas
13-Chlorophyll found in plant cells as well as essential to the process of photosynthesis, contains 2.72% Mg by mass. Presuming one magnesium atom per chlorophyll molecule, Compute the molecular weight of chlorophyll.
A metal sulfide, M_2(CO_3)_3, has a K_sp of 5.35*10^-42. What is the molar solubility of this sulfide in water. Assume the sulfide behaves ideally
in a titration of hcl i have a molarity of 0.991 naoh and a volume of 7.6 ml to reach an equivalence point for the
You need 1.00 L of .125M sulfuric acid solution. Describe how you would prepare this solution from a supply of 6.00 M H2SO4 solution, distilled water, and a 1-L volumetric flask.
A galvanic cell is constructed with a silver-silver chloride electrode, and a nickel strip immersed in a beaker containing 1.56 x 10-2 M solution of NiCl2. Determine the balanced cell reaction and calculate the potential of the cell. Enter in Volt..
How do you determine the charge of an electron when given the number of moles of electrons and the amount of electricity passed through the circuit?
Aluminum metal is made industrially by electrolysis of Al2O3 dissolved in molten Na3AlF6. How many grams of Al metal are produced when 8.80 X 103 coulombs pass through the cell?
What is the overall balanced reaction in the direction that it is spontaneous and calculate the standard cell potential.
estimate the amount of carbon dioxide (in tonnes) that is consumed over a 6-month period by the forest, assuming trees are 50% glucose and 50% water. How much sunlight (in GJ) has the forest absorbed in that period?
if the reaction fe2n s 32 h2 g -gt lt- 2fes nh3g comes to equilibrium at a total pressure of 1 atm analysis of the
suppose you have a 40.3 ml sample of a solution containing a mixture of nitric acid hno3? and hydrochloric acid hcl.
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