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The standard enthalpy of formation for which of the following is zero :-
(1) CH3OH(ℓ)
(2) HF(g)
(3) H2O(ℓ)
(4) F2(g)
(1) CH3OH(ℓ)
(2) HF(g)
(3) H2O(ℓ)
(4) F2(g)
Dear sir
IN Potentiometric determination of hydrogen sulfide, carbonyl sulfide and mercaptans in petroleum products METROHM APPLICATION NO.135/2 e-we use Alkaline solvent for low molecular mercaptans:
2.7 g CH3COONa * 3 H2O is dissolved in 25 mL dist. water. Add 975 mL IPA as
well as 10 mL w(NH3) = 25% and mix.
• Acidic solvent for higher molecular mercaptans:
2.7 g CH3COONa * 3 H2O is dissolved in 25 mL dist. water. Add 975 mL IPA as
well as 4.6 mL glacial acetic acid and mix.
can you tell us 1)why use CH3CCOONa and why i use NaOH?
2)why i can not use one solution for high or low molecular mercaptans?
3)WHY CAN I USE CH3COOH FOR HIGHER MOLECULAR MERCAPTANS?
BEST REGARDS
EDWARD
IN Potentiometric determination of hydrogen sulfide, carbonyl sulfide and mercaptans in petroleum products METROHM APPLICATION NO.135/2 e-we use Alkaline solvent for low molecular mercaptans:
2.7 g CH3COONa * 3 H2O is dissolved in 25 mL dist. water. Add 975 mL IPA as
well as 10 mL w(NH3) = 25% and mix.
• Acidic solvent for higher molecular mercaptans:
2.7 g CH3COONa * 3 H2O is dissolved in 25 mL dist. water. Add 975 mL IPA as
well as 4.6 mL glacial acetic acid and mix.
can you tell us 1)why use CH3CCOONa and why i use NaOH?
2)why i can not use one solution for high or low molecular mercaptans?
3)WHY CAN I USE CH3COOH FOR HIGHER MOLECULAR MERCAPTANS?
BEST REGARDS
EDWARD
Dear sir
in determination H2S in crud oil we used Borax solution 30% to extract H2S from crud oil to borax then acidify with HCl then titration with iodine and thiosulfate sodium.
i want to know why i use Borax ?because i can use NaOH or another base.
in determination H2S in crud oil we used Borax solution 30% to extract H2S from crud oil to borax then acidify with HCl then titration with iodine and thiosulfate sodium.
i want to know why i use Borax ?because i can use NaOH or another base.
Calculate the volume,mass and number of molecules liberated when 299g of sodium reacts with excess water at STP
DEAR SIR
I HAVE A QUESTION ABOUT GAS CHROMATOGRAPHY-FID DETECTION LIMIT.
HOW TO CONVERT DETECTION LIMIT Pg C/S TO PPM MOL HYDROCARBON?FOR EXAMPLE 2PgC/s.to ppm mol propane?
BEST REGARDS
EDWARD
I HAVE A QUESTION ABOUT GAS CHROMATOGRAPHY-FID DETECTION LIMIT.
HOW TO CONVERT DETECTION LIMIT Pg C/S TO PPM MOL HYDROCARBON?FOR EXAMPLE 2PgC/s.to ppm mol propane?
BEST REGARDS
EDWARD
DEAR SIR
IN GAS CHROMATOGRAPHY FOR EXAMPLE FID DETECTOR DETECTION LIMIT IS PgC/s. how can i convert it to ppm mol propane for example?
best regards
edward
IN GAS CHROMATOGRAPHY FOR EXAMPLE FID DETECTOR DETECTION LIMIT IS PgC/s. how can i convert it to ppm mol propane for example?
best regards
edward
what do you mean emission and absorption spectra of hydrogen atom .
If 1.50g g of A reacts with 1.75g g of B what is the mass of C
Mixture of 100 ml 0.1 M H3PO4 and 100 ml 0.1 M NaOH will be
pH values of 0.1 M HCL and 0.1 M CH3COOH are
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#340153 on Dec 2023
#340153 on Dec 2023