Skip to main content
Title
Potassium Chromate
SKU
RXSOL-60-6112-020
Supply Location::
Locations

Potassium Chromate manufacturer supplier distributor in Mumbai, Kandla, Kolkata, Vizag, Chennai, India, Fujairah, Dubai, Sharjah, UAE, Gulf, Middle East, Muscat Oman, Kenya Africa. Get the best quality of Potassium Chromate at a competitive price from us. We have ready stock of Potassium Chromate in India, UAE Gulf, Oman, Kenya Africa. Contact us for bulk as well as small orders.

Category
Boiler Chemicals-42
SHORT DESCRIPTION:

Potassium Chromate is used as an indicator in the determination of Chloride by titration with standard Silver Nitrate solution. This method is called the Mohr method of determining Chloride and is based on the formation of a red precipitate of Silver Chromate at the endpoint after all the Chloride has been precipitated as white Silver Chloride. A 5% solution of Potassium Chromate that has been Chloride neutralized is commonly used. Approximately 1 mL of this indicator should be used per 100 mL of sample volume.

PRODUCT REMARK: TAG IDENFIFICATION: FIELD NOTE:

The accuracy of the Mohr method decreases as the Silver Nitrate concentration decreases due to the amount of excess Silver Nitrate that must be added to produce enough Silver Chromate to be seen visually. The Mohr method must also be performed in the pH range of 6.5 to 9. If the pH is too high, brownish Silver Hydroxide forms and masks the endpoint. If the pH is too low, the Chromate is converted to Dichromate and the endpoint comes too late or can not be perceived at all. In the presence of Ammonium ions, the pH must be kept below 7.2 to prevent partial conversion of the precipitate to soluble Ammine complexes.

For comparison purposes, all Mohr tirations should be carried out at about the same temperature, since the solubilities of Silver Chloride and Silver Chromate depend on temperature. Good stirring during the addition of the Silver Nitrate is also required; otherwise, Silver Chromate that forms locally before the endpoint can become occluded in the Silver Chloride precipitate instead of redissolving. Poor agitation could lead to an endpoint that is neither sharp nor reproducible. The reactions for the Mohr titration are:

 

Ag+ + Cl- → AgCl (white precipitate)

 

2 Ag+ (excess) + CrO42- → Ag2CrO4 (red precipitate at endpoint)

About

We are professional and reliable provider since we offer customers the most powerful and beautiful themes. Besides, we always catch the latest technology and adapt to follow world’s new trends to deliver the best themes to the market.

Contact info

Get on time delivery to any port, any city in Oman. We have full inventory of fast running chemicals. Get our quotation by simply sending an email on the below mail id.

Featured Post