CHEMICAL FORMULAE, EQUATIONS AND CALCULATIONS: EXAMPLE 2
2
Balance the equation for the combustion of ethane:
C2H6 + O2 + CO2 + H2O
Starting from the left, balance the carbons:
C2H6 + O2 → 2CO2 + H2O
Now the hydrogens:
CHA + 0, 200, + 3H2O

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Achemistry student weighs out 0.306 g of citric acid (h3c6h5o7), a triprotic acid, into a 250 ml volumetric flask and dilutes to the mark with distilled water. he plans to titrate the acid with 0.1000 m naoh solution. calculate the volume of naoh solution the student will need to add to reach the final equivalence point. be sure your answer has the correct number of significant digits.