Search found 7 matches

by NTrivedi
05 Sep 2022, 10:16
Forum: Safety with Chemicals
Topic: Stocktake programs
Replies: 22
Views: 6657

Re: Stocktake programs

Hi All It is a good question applicable to most labtechs. I think that even if available, any readily available commercial labstock software might not be perfectly suitable for everyone due to different level and type of requirements. For simple requirements as discussed Excel or similar spreadsheet...
by NTrivedi
05 May 2015, 13:19
Forum: Safety with Chemicals
Topic: potassium permanganate stain removal
Replies: 6
Views: 4579

Re: potassium permanganate stain removal

Hi Everyone, dilute Solution (concentration does not matter - approx. 0.1 M will be sufficient) of Iron (II) ammonium sulfate will help to remove any stain of KMnO4. I have been using it for long time without any problem to clean the burettes stained with KMnO4 after titration. The used solution can...
by NTrivedi
17 Aug 2012, 13:37
Forum: Chemistry and Labware - General
Topic: Tollen's reagent
Replies: 3
Views: 2850

Re: Tollen's reagent

My reply is late however I hope it might be useful and relevant for some. I find it is easier to organise the tollen's reagent preparation by year-11/12 teacher/student in laboratory as follows- Prepare and supply dropper bottles of 1. 0.1 M Silver nitrate solution 2. 2 M sodium hydroxide solution 3...
by NTrivedi
27 Oct 2009, 12:07
Forum: Recipes and Pracs
Topic: Hydrogen peroxide concentration
Replies: 12
Views: 9034

Thanks to all for reply about Hydrogen peroxide concentratio

I appreciate the reply posted by all. particularly the website referred http://www.trimen.pl/witek/calculators/calculators.html is good.

Thanks to ALL who contributed to the answer.

N TRIVEDI
by NTrivedi
16 Oct 2009, 10:24
Forum: Recipes and Pracs
Topic: Hydrogen peroxide concentration
Replies: 12
Views: 9034

Hydrogen peroxide concentration

Can anybody please tell how to calculate molar concentration of hydrogen peroxide from % concentration? for example if we have 6% hydrogen peroxide what is the molar concentration of the same? Thanks- NEHAL
by NTrivedi
17 Mar 2009, 11:24
Forum: Biology, Physics...
Topic: Agar-phenopthalein jelly
Replies: 29
Views: 10132

Re: Agar-phenopthalein jelly

This is the recipe I compiled after experience and is used for surface Area:Volume experiment. It works well. --------------------------------- Procedure: Get the required number of containers (e.g. takeaway containers) for agar jelly to be prepared. Calculation: 1. Fill the takeaway container (whic...
by NTrivedi
17 Mar 2009, 10:48
Forum: Chemistry and Labware - General
Topic: 2M copper sulfate
Replies: 15
Views: 6765

Re: 2M copper sulfate

Hi All, I came across this request last year for 2 M CuSO4 Solution. If you look at solubility data on http://encyclopedia.thefreedictionary.com/Solubility+table At 20 deg C it is 32 gms/100 ml and at 30 deg C 37.8gms/100 ml. Now looking at molecular weight and solubility data I think it is possible...