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Balance the following redox reaction in an acidic medium:
Mn2+(aq) + NaBiO3(s) → Bi3+(aq) + MnO4-(aq)
The first six ionization energies, in KJ mol-1, of an element, are 1086, 2353, 4621, 6223, 37832, and 47278. In which group of the Periodic Table is this element?
When aqueous solutions of Na2SO4 and Pb(NO3)2 are mixed, PbSO4 precipitates. Calculate the limiting reagent and mass of PbSO4 when a 1.25 L solution of 0.0500 M Pb(NO3)2 and a 2.00 L solution of 0.0250 M Na2SO4 are mixed. (Hint: start first by balancing the equation of the reaction between Na2SO4 and Pb(NO3)2
When aqueous solutions of Na2SO4 and Pb(NO3)2 are mixed, PbSO4 precipitates. Calculate the limiting reagent and mass of PbSO4 when a 1.25 L solution of 0.0500 M Pb(NO3)2 and a 2.00 L solution of 0.0250 M Na2SO4 are mixed. (Hint: start first by balancing the equation of the reaction between Na2SO4 and Pb(NO3)2.
When aqueous solutions of Na2SO4 and Pb(NO3)2 are mixed, PbSO4 precipitates. Calculate the limiting reagent and mass of PbSO4 when a 1.25 L solution of 0.0500 M Pb(NO3)2 and a 2.00 L solution of 0.0250 M Na2SO4 are mixed. (Hint: start first by balancing the equation of the reaction between Na2SO4 and Pb(NO3)2.
Beaker
1
2
3
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6
Sample Volume (mL)
1000
1000
1000
1000
1000
1000
Coagulant
(ppm)
12
14
16
18
20
22
SG of Coagulant: 1.22
Calculate what is the dosage in ml for 12ppm, 14ppm, 16ppm, 18ppm, 20ppm, 22ppm in the attached table for Jar Test purpose?
b. What weight of limestone should be taken so that 1/20 the number of milligrams of CaSO4 obtained will represent the percentage of CaO in the mineral?
What volume (in L) of 0.246 M HNO3 solution is required to react completely with 38.6 mL of 0.0515 M Ba(OH)2?Ba(OH)2 + 2HNO3 → Ba(NO3)2 + 2H2O
Illustrate the phase diagram of a substance given with the following points: a triple point at 0.70 atm and 80 ºC; a normal freezing point at 100 ºC; a normal boiling point at 350 ºC; and a critical point at 1.6 atm and 810 ºC. For this,
complete the following:
1. Roughly sketch the phase diagram, using units of atmosphere and degree
Celsius. Label the area 1, 2, and 3, and points T and C on the diagram.
2. Describe what one would see at pressures and temperatures above 1.25 atm and 300 ºC.
3. Describe the phase changes from 100 ºC to 200 ºC at 1.5 atm.
4. What exists in a system that is at 1 atm and 100 ºC?
5. What exists in a system that is at 1 atm and 325 ºC?
Calculate the formula mass of caso4. what is the molarity of caso4 in a solution containing 1.2 gram of cso4 in a volume of 50 ml how many grams of caso4 are in 50 ml of 0.086 m caso4?
