Question

Name (First and Last): Stoichiometry and Mass Relationships Report Pages Obtain values from the pictures found in the procedure to complete the data table below A. Data: 65.62 + Mass beaker + NaCO3 + 66.62g 65.62g 2 Mass empty beaker 3 Mass Na:COs used 19. 4 Mass graduated cylinder + HCl(aq) 5 Mass empty graduated cylinder 12.689 4.41 g 8. 279 1 74.899 Mass HCl(aq) used 65.629 19 8.27 Total mass before rxn: beaker + Nazco, + HCl(aq) 65.623 8 Mass beaker + salt solution after reaction 74.469 9 Mass of CO2 generated by reaction Mass of beaker + NaCl (after drying) 66.729 B. Calculations and Questions 1. Write a balanced equation for the reaction between sodium carbonate (Na2CO3) and hydrochloric acid (HCI). 1 | Page

Answer 1

1 1. Nascoa + 2HCl -> 2 Nael + CO + H2O | 2. Molecular mass Narco, = (2x23)+12448 - =106 g/mol T Moles Na₂CO₃ = Criven mass Molecular mast 1 - 1ģ 106 glmol = 0.0094 mol I Theoritical moles of CO2 1 Produced - Moleat of Na₂CO3 used E = 0.0094 mol Molecnlar mass = 12+ 2(16) = 44 g/mol Mass of coa produced = moles y molecular mass (Theoritical Yield ) = 0.0094 mol x 44 g/mol = 0.4136 g 3. Mass of CO₂ (Experimenta) = Total mass before rx n_ total mass - after rxh = 74.89.- 74.46 300.43 g

- % Vield (co₂) Experimetal value x 100 theoritical valine x 100 = 0.43 0.4136 = 103.96 % 4. Moles of Na₂CO3 Produced = 2x moles of Nach produced used Moles of Naal produced = (theoritical) 2x 0.0094 0.0188 moles Molecular mass of naar 23+ 38.5 . = 58.5 g/mol Mass of Nard (theoritical) = moles x molecular mass = 0.0188 458.5 1.0 998 g 1 Experimental mass of Nad - (Mass beaker t stone = 66.72 - 65.62 a lolog a Mield 1,10 +100 = Saintlo 0998 100.018 V.

Moles of sodium carbonate used in reaction =0.0094 moles

Theoretical mass of CO​​​​​2 produced = 0.4136 g

Theoretical mass of NaCl produced = 1.0998 g

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