Homework Help: chemistry

Posted by Molarity on Friday, September 16, 2011 at 3:24pm.

Somewhat confused... my homework is asking me to calculate morality of sodium thiosulfate from a 55 ml solution. the sodium's volume is 50 ml and has a concentration of 0.25M. The rest of the 55ml comes from the 5ml of HCL.

chemistry - bobpursley, Friday, September 16, 2011 at 4:31pm
Hey: remember HCl is mostly water.

volume of Solution: .055liters.

you have diluted it 1.1 times. One part stock, .1 added acid solution.

new concentration: .25/1.1 M

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