2. THE BASIKZ “Okay Lets Breakdown The Meaning Off Stoichiometric Calculations……” 1stStoichiometric Comes From Stoichiometry Which Is The Branch Of Chemistry Concerned With Measuring The Proportions Of Elements That Combine During Chemical Reactions. 2ndCalculation The Process Of Working Out The Answer To A Mathematical Problem.
3. Now that you know that you might ask ??What Tools Are Needed to Perform Stoichiometric Calculations?? All S.C begin with a balanced chemical equation. Mole ratio based on Chem.-Equations are needed, as well as mass to mole.
4. ::Examplez:: Answer on Next Slide Mole-To-Mass Analyze 1 Known Moles of chlorine = 1.25 mol CI2 Unknown Mass of sodium chloride = ? g NaCI 2 Solve 1.25 mol Grams(g) 2Na(s) = CI2(g) 2NaCI (s) Write the Balanced chemical equation, and Idnetify the known and the unknown values. 2 mol NaCI Mole Ratio: 1 mol CI2 Multiply moles of CI2 by the mole ratio to get moles of NaCI 2 mol NaCI = 1.25 mol CI2 x 2.50 mol NaCI 1 mol CI2 58.44g NaCI Multipy moles of NaCI by the molar mass to get grams of NaCI = 2.50 mol NaCI2 x 146 g NaCI 1 mol NaCI2
5. Answer Since The Given # Of Moles has 3 significant figures, the mass of NaCI also has three. To Quickly assess whether the calculated mass value for NaCI is Correct, perform the calculations in reverse: divide the mass of NaCI by the molar mass of NaCI, and then divide the result by 2. You will get the given # of Moles CI2
6. Mass-To-Mass Mass-To-Mass THE STEPS 4 MASS TO MASS ARE SIMILAR Write the balanced chemical equation, and identify the known and unknown values THEN Multiply gram by the inverse of molar mass THEN Multiply mole of H2O by the molar mass
7. That’s all u need to know about Stoichiometric Calculations
