Re: Mixing Indicators From Powder

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j yeardly

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Jan 21, 2013, 1:53:15 PM1/21/13
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dissolve 0.4g of Methyl orange in  200ml of IDA      Red Yellow 3.0 - 4.5

or
Screened methyl orange
The normal color change of some indicators is not always clear and may be altered by ‘screening’. The
most common screened indicator used in schools is screened methyl orange. Dissolve 1 g of methyl orange and 2.6 g of xylene cyanol FF in 1000 ml of water. The end point is a grey
color.

Joe Anderson

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Jan 25, 2013, 2:36:37 PM1/25/13
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Anyone know the correct way to prepare litmus blue solutions? I have a large amount of the powder that I need a solution of.

On Sunday, January 20, 2013 10:40:52 PM UTC, steveb...@gmail.com wrote:
I just received methyl Orange From Elemental scientific and would like to know what the proper way of making it up is. to be used in lab 11.4
Thank you

j yeardly

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Jan 30, 2013, 6:18:03 AM1/30/13
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Litmus solution
• Dissolve 1 g of litmus in 1000 ml of water. Other recipes suggest up to 10 g of litmus but this may
depend upon the age of the sample. Filter if necessary.
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