Posted by Maame on Saturday, December 10, 2011 at 4:10pm.
i would be great to show me the answer , but do it step by step so i understand better
I don't know all of the details of the procedure you use but here are the steps you need.
Cl2 + 2I^- ==> I2 + 2Cl^-
So 500 mL sample x 250 mg/L means you have 250 mg/L x 0.500 L = 125 mg Cl2 present. How many moles is that?
0.125g/molar mass Cl2 = about 0.002.
Adjust for the volume of sample you will use. Surely you won't use all 500 mL.
Then moles KI soln required is twice moles Cl2 you have in the volume taken for analysis and L KI = moles KI/M KI. Solve for L and convert to mL.
How many grams of H2 would be formed if 34 grams of carbon reacted with an unlimited amount of H2O? The reaction is:
C + H2O → CO + H2
The atomic mass of C is 12.01 g/mole. The atomic mass of H2 is 2.016 g/mole
How many grams of H2 would be formed if 34 grams of carbon reacted with an unlimited amount of H2O? The reaction is:
C + H2O → CO + H2
The atomic mass of C is 12.01 g/mole. The atomic mass of H2 is 2.016 g/mole
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