CH110 Lecture Notes - Lecture 2: Significant Figures, Electrolyte
Document Summary
When adding or subtracing, the number of decimal places in the result is equal to the least number of decimal places of the numbers being added or subtracted. When muliplying or dividing, the number of signiicant igures in the result is equal to the least number of sig igs of the numbers being muliplied or divided. Postpone adjusing result to the correct number of signiicant igures unil a calculaion is complete. Balancing chemical equaions: to balance, we place couning numbers in front of the formulas unil the equaion is balanced, the numbers are called stoichiometric coeicients and they represent numbers of atoms, molecules or moles of reactants and products. In a balanced equaion there must be the same number of atoms of each element on. 3. both sides: and the charge must be conserved. Balance elements that occur in only one compound on each side irst. Soluion: homogeneous mixture made up of a solvent and a solute.
