Page 1 of 3Name: Chem 10, Section: Lab Partner: Experiment Date: Mole Ratios and Reaction Stoichiometry Reaction A: Sodium Bicarbonate and Hydrochloric Acid Experimental Data (a) Mass of evaporating dish + watch glass (b) Mass of evaporating dish + watch glass + sodium bicarbonate (c) Mass of sodium bicarbonate used (d) Mass of evaporating dish + watch glass + sodium chloride (e) Mass of sodium chloride collected (experimental yield) Data Analysis 1) Use your data to determine the experimental mole-to-mole ratio between sodium bicarbonate and sodium chloride. Show your work for each step. • Convert the mass of sodium bicarbonate used to moles. • Convert the mass of sodium chloride collected to moles. • Divide both of your results from the preceding two steps by the lower mole value to determine the simplest mole-to-mole ratio between sodium bicarbonate and sodium chloride. Simplest mole ratio before rounding moles NaHCO3 : moles NaCl Simplest whole number mole ratio after rounding moles NaHCO3 : moles NaClPage 2 of 32) Determine your percent yield of sodium chloride in reaction A. Show your work for each step. • Write the balanced equation for reaction A – the reaction between sodium bicarbonate and hydrochloric acid. • Using mass-to-mass stoichiometry, calculate the theoretical yield of NaCl for reaction A. Use your initial mass of sodium bicarbonate reactant as a starting point, along with the relevant mole ratio from the balanced equation to perform this calculation. • Calculate your percent yield of sodium chloride product. Reaction B: Sodium Carbonate and Hydrochloric Acid Experimental Data (a) Mass of evaporating dish + watch glass (b) Mass of evaporating dish + watch glass + sodium carbonate (c) Mass of sodium carbonate used (d) Mass of evaporating dish + watch glass + sodium chloride (e) Mass of sodium chloride collected (experimental yield) Data Analysis 1) Use your data to determine the experimental mole-to-mole ratio between sodium carbonate and sodium chloride. Show your work for each step. • Convert the mass of sodium carbonate used to moles. • Convert the mass of sodium chloride collected to moles.Page 3 of 3• Divide both of your results from the preceding two steps by the lower mole value to determine the simplest mole-to-mole ratio between sodium carbonate and sodium chloride. Simplest mole ratio before rounding moles Na2CO3 : moles NaCl Simplest whole number mole ratio after rounding moles Na2CO3 : moles NaCl 2) Determine your percent yield of sodium chloride in reaction B. Show your work for each step. • Write the balanced equation for reaction B – the reaction between sodium carbonate and hydrochloric acid. • Using mass-to-mass stoichiometry, calculate the theoretical yield of NaCl for reaction B. Use your initial mass of sodium carbonate reactant as a starting point, along with the relevant mole ratio from the balanced equation to perform this calculation. • Calculate your percent yield of sodium chloride product. 3) Is your percent yield here for reaction B greater than or less than 100%? Give one possible source of error that could explain the percent yield you
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