A. Write the balanced equation for the reaction between KHCO_a and HCl: B. Exper

Question

A. Write the balanced equation for the reaction between KHCO_a and HCl: B. Experimental Data and Calculations: Record all measurement to the highest precision of the balance and remember to use the proper number of significant figures in all calculations. (The number 0.004 has only one significant figure.) 1. Mass of empty evaporating dish ___ g 2. Mass of dish and dry KHCO_3 ___ g 3. Mass of dish and residue (KCl) after first heating ___ g 4. Mass of dish and residue (KCl) after second heating ___ g 5. Mass of dish and residue (KCl) after third heating (if necessary) ___ g 6. Mass of potassium bicarbonate ___ g show calculation set-up 7. Moles of potassium bicarbonate ___ mol show calculation set-up 8. Experimental mass of potassium chloride obtained ___ g show calculation set-up 9. Experimental moles of potassium chloride obtained ___ mol show calculation set-up 10. Theoretical moles of KCl ___ mol show calculation set-up 11. Theoretical mass of KC

Explanation / Answer

The balanced reaction between KHCO3 and HCl is : KHCO3 + HCl = KCl + CO2 + H2O

Theoretical moles of KCL = 0.0284 moles

Theoretical mass of KCl = 0.0285 mol * 74.88gm/mol = 2.134 gm

% error =[ I (2.134- 2.145) I/ 2.134] * 100 = 0.52%

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