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prepare a concentrated aqueous solution of di chromate and add solid KOH warm till orange colour change to yellow and then filter the solution the filtrate is allow to evaporate and get solid potassium chromate.
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∙ 14y ago
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∙ 12y agoK2Cr2O7 + 4H2SO4 + 3CH3CH2OH --> K2 SO4 + Cr2(SO4)3 + 3CH3CHO
Four parts Sulfuric Acid and three parts Ethanol to one part Potassium Dichromate. It is best to have an excess of Ethanol to keep reaction temperature to a minimum. Do not let the temperature get too high above 40 degrees C or a ligand exchange will occur and the complex formed is impossible to bring out of solution.
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∙ 11y agoyou just need to dissolve 50 g of potassium chormate(for preparing 1 L) in a litle of destilled water, then add AgNO3 solution untill it get a red precipitate, let stand for 12 hours then filter and dilute to 1 L with distelled water
Am a chemical engineer, u can find this data on the SMWW
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∙ 10y agoYou take 0.05 moles of potassium dichromate and dissolve it in a liter of water. Or, alternatively, 0.1 moles of potassium dichromate and dissolve it in two liters of water.
(Properly speaking, you should dissolve it to make one or two liters of solution, but the difference is going to be negligible).
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∙ 12y agodessolve 1.6598g in 1000 ml of distll water and then dilute 100 ml in 1000 ml d water. thats it.
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∙ 12y agoK2Cr2O7, Molecular mass = 39x2+55x2+16x7 = 300, equivalent mass = 300/2 = 150, dissolve 150g Potassium dichromate in one dm3 distilled water.
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∙ 9y agoDilute the Standard Solution (by definition exactly 1 N) 50 times by taking 20 mL 1.00 N sol'n and adding this up to 1.00 L with water
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Why you can use 4.9035 g K2Cr2O7 to prepare 0.1 n solution?
The equivalent of potassium dichromate is the molar mass/6: 294,1846/6=49,307666. For a 0,1 N solution: 49,30766/10 = 4,93076 g
How do you Prepare 0.02 N potassium permanganate solution?
pottassium permangate
How do you prepare 0.05 N solution of KMnO4?
Dissolve 1,65 g potassium permanganate for analysis in 1 L demineralized water.
How do you prepare standard solution of potassium dichromate to compare icteric index of serum?
for preparing 0.1 normal solution of potassium permanganate you have to disssolve 3.16 g potssium permangnate in 1L water bt in alkaline or neutral medium reactions of potassium permanganate is different and Mn gains 3 electrons in redox reaction,so far alkaline medium redox titration equivalent wt of KMnO4 will be 158\3=52.6.so far,0.1 N KMnO4 in alkaline medium redox titration dissolve 5.26 g in 1L sol.
What are the principal quantum number and the azimuthal quantum number in an atom of Potassium?
Potassium has an electronic configuration of 1s2, 2s2, 2p6, 3s2, 3p6, 4s1 The azimuthal quantum number of 0corresonds to an s subshell, 1 p subshell You can see that you have n=1, l=0 n=2, l=0; n=2, l=1 n=3, l=0; n=3, l=1, n=4, l=0
Why you can use 4.9035 g K2Cr2O7 to prepare 0.1 n solution?
The equivalent of potassium dichromate is the molar mass/6: 294,1846/6=49,307666. For a 0,1 N solution: 49,30766/10 = 4,93076 g
How do you make up 1.5 N Potassium Dichromate in 1 liter solution?
- Dry potassium dichromate (standard certified quality, from NIST - SRM 136f or from another supplier), using a platinum dish or crucible. - Follow the mode of drying (generally 1 hour at 120 0C in an oven) indicated by the supplier. Place the potassium dichromate in an exsicator. - Prepare a volume of demineralized or distilled water - Weight 73,546 25 g potassium dichromate in a platinum dish calcined to a constant weight; apply a correction for the flotability of the air and the purity of the dichromate. Use a metrologically checked microbalance. - Place carefully the potassium dichromate in a 1 000 mL volumetric flask, dried and washed - Add about 900 mL water - Place the volumetric flask in a thermostat at 20 0C; after approx. 30 min add the water exactly to the mark. - Stirr the content of the volumetric flask; place a clear label on the flask (concentration, material, date of preparation, operator's name).
How do you prepare 500 mils 1 potassium hydroxide from N potassium hydroxide solution?
A mil is a measurement that equals one-thousandth of an inch, or 0.001 inch.
How do you Prepare 0.02 N potassium permanganate solution?
pottassium permangate
What is the strength of potassium dichromate solution whose ten ml required fifteen ml of N by ten hypo solution for neutralisation?
N1v1=n2v2 => n*10=15*0.1 =>n=0.15
How do you prepare 0.05 N solution of KMnO4?
Dissolve 1,65 g potassium permanganate for analysis in 1 L demineralized water.
How do you prepare potassium chromate solution?
Dilute the Standard Solution (by definition exactly 1 N) 50 times by taking 20 mL 1.00 N sol'n and adding this up to 1.00 L with water
How do you prepare standard solution of potassium dichromate to compare icteric index of serum?
for preparing 0.1 normal solution of potassium permanganate you have to disssolve 3.16 g potssium permangnate in 1L water bt in alkaline or neutral medium reactions of potassium permanganate is different and Mn gains 3 electrons in redox reaction,so far alkaline medium redox titration equivalent wt of KMnO4 will be 158\3=52.6.so far,0.1 N KMnO4 in alkaline medium redox titration dissolve 5.26 g in 1L sol.
What are the principal quantum number and the azimuthal quantum number in an atom of Potassium?
Potassium has an electronic configuration of 1s2, 2s2, 2p6, 3s2, 3p6, 4s1 The azimuthal quantum number of 0corresonds to an s subshell, 1 p subshell You can see that you have n=1, l=0 n=2, l=0; n=2, l=1 n=3, l=0; n=3, l=1, n=4, l=0
How prepare 0.1 n k2cr2o7?
Weigh 4.9035g K2Cr2O7 make up to 1 liter
How do you prepare oxalic acid?
how do prepare 0.1 N Oxalic acid
What is the oxidation number for KNO?
In KNO3 the oxidation number of potassium (K) is 1+, for nitrogen (N) it is 5+, and for each oxygen (O) it is 2-
