Sunday
May 19, 2013

# Posts by melba

Total # Posts: 24

chem
What volume of a 0.2 N NaoH solution do you expect to use in order to titrate 25ml (sample out of 250ml) of a 0.200 N oxalic acid solution? heeeelp! Equation is H2C2O4 + 2NaOH==> 2H2O + Na2C2O4 I assume that is 25.00 mL H2C2O4. milliequivalents(meq) NaOH = meq H2C2O4 25 mL ...

calc
standard equations of circles that have centers on line 5x-2y=-21 and are tangent to both axis. Any ideas?? First express the line as in point slope form y=(5/2)x - 21/2 The center must be on the line, so it is a point expressed as (x,(5/2)x - 21/2) In order for the circle to ...

Chem Lab
d = m/v 1.01=m/6.80 ml m=6.868gr coefficients of reaction: 2,2,1 two moles of H2O2 produce 1 mole of O2(g) then 6.868gr of H202 should produce...? I try .1009524929 and .2019049859 but they are not the right values...help...I am stuck... See answer I posted to the original pro...

lab
Number of moles of oxygen gas produced from the complete catalyzed decomposition of 6.80ml sample of a 3.5% solution. Density of the 3.5% solution of H2O2 is 1.01g/ml Let's find out what you know about this and work from there. Show your calculations to the point that you ...

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