Answer Posted / mr felix
Weigh accurately 6.80g(±0.001g) of potassium dihydrogen phosphate (KH2PO4) and dissolve it in 1L-volumetric flask which contains already like 300mL of pure water ; then weigh accurately 0.90g(±0.001g) of NaOH that you transfer into the same flask, shakes well to homogenize the solution. The last step is all about topping up to the volume. surely that prepared solution will have exactly pH 6.8 and there in no need to adjust pH with other chemicals. Thanks my colleagues scientists, (remember that this procedure is not the only one that is correct, it depends on some factors like field of application,...
| Is This Answer Correct ? | 0 Yes | 0 No |
Post New Answer View All Answers
What is viod volume and peak purity in HPLC?
CAN WE DETERMINE THE PEAK PURITY IN GAS CHROMATOGRAPHY ANALYSIS?
My question about gas chromatography sulfur chemiluminsecence detector. I test unknown sample gas by GC-SCD (calibrated ) and the result of *H2S is 279 PPM , *but when I test the same sample with the GC-TCD (calibrated ) the value of *H2S is 2500 PPM . I'd like to inform you that both GCs are calibrated and have very good operation conditions with stable parameters . the question is if the sample gas with higher H2S over detection limits of SCD detector (1000 ppm). why the result it 279 ppm Best regards
Please give idea about method development for cleaning method and how maco level establish
Is it nessesary all multimedia dissolution require descriminatory?
How do we quantify crystaline and amarpous forms by using (NMR, XRD)spectroscopic techniques? Which any others instruments are useful for this quantification? explain
How can we calculate offset value pH measurment
how to develop the icp ms method? Application of icp ms?
What is the use of tlc and hplc? And when and where use?
why holium oxide prepared in 10% HCLO4 SOLUTION
How can we confirm the HPLC column is end-capped or not? Is it possible to identify by physical appearance?
In the isomers,enantiomers give the only physical properties present such that no chemical properties present.
A ha tc is actual defination of retention time?
why require to do water content for drug product?
