t.a. acid kit

[outdoorsmadness]

i have an acid kit and after figuring out how to use it i spilled the sodium hydroxide solution, so i went to my lhbs and got some more, well the stuff that origionaly came with kit was .2n and my new bottle is .1n, do i use half the amount or twice the amount or what? im confused on what to do.

thanks Bryan

 

[surlees]

ODM,
It will require twice as much .1N as .2N NaOH for the same size sample.

Fred

 

[outdoorsmadness]

ODM,
It will require twice as much .1N as .2N NaOH for the same size sample.

Fred

so if it takes 6 cc of the original .2n to reach the point where the color dosent change anymore then it should be equvilent to 12 cc to reach same result , is this correct?
thanks Bryan

 

[surlees]

Yes, that's correct. In fact, you can use any normality of NaOH as long as you factor it into the following formula:

TA=(75 x mL of NaOH x N of NaOH)/mL of wine sample

Fred

 

[Luc]

And you can easily test for the accuracy of your solution if you have a 1 liter measuring beaker at hand:

take 8 gram tartaric acid and dissolve that in 1 liter water.
You now have a solution with an acidity of 8.
You can do a test with that.

I did it all the time for accuracy tests on my series of acid testing with a titration kit:

http://wijnmaker.blogspot.com/2009/11/zuurmeting-04-measuring-acidity-04.html

At the bottom of this you will find references to the previous articles. One article is yet to come....

Luc