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Chemistry Forums for Students => Analytical Chemistry Forum => Topic started by: kiloa on April 17, 2019, 03:32:39 PM

Title: what is the required weight from sodium molybdate ?
Post by: kiloa on April 17, 2019, 03:32:39 PM

dear all,
if you need 70g sodium molybdate for preparing certain reagent but i have ammonium molybdate instead of sodium molybdate ....how can i calculate the required weight of ammonium molybdate ?

Title: Re: what is the required weight from sodium molybdate ?
Post by: sjb on April 17, 2019, 04:45:30 PM

What do you need it for? It might be that you can't easily swap as you suggest.

Title: Re: what is the required weight from sodium molybdate ?
Post by: kiloa on April 17, 2019, 10:44:25 PM

i used one of them to precipitate phosphorus as Phosphomolybdate ,so the molybdate is required component

Title: Re: what is the required weight from sodium molybdate ?
Post by: kiloa on April 19, 2019, 10:25:23 AM

any help ??!!

Title: Re: what is the required weight from sodium molybdate ?
Post by: Borek on April 19, 2019, 10:44:22 AM

Hint: use equimolar amount.

Title: Re: what is the required weight from sodium molybdate ?
Post by: kiloa on April 19, 2019, 04:05:42 PM

what do you mean ?

Title: Re: what is the required weight from sodium molybdate ?
Post by: Borek on April 19, 2019, 05:37:59 PM

No matter which salt you use, you need the same number of moles.

Title: Re: what is the required weight from sodium molybdate ?
Post by: kiloa on April 20, 2019, 06:38:22 AM

yes yes , i have known what you do mean ... thanks so much