Stoichiometry of an Acid-Base reaction

You started with 2.000 g of Na2CO3 (molar mass = 105.989 g/mol). How many moles of Na2CO3 were present in the beaker?

1.887 g x 10-2 moles

Based on the number of moles of Na2CO3 consumed and NaCl produced, what is the stoichiometry of the reaction?

1 Na2CO3: 2 NaCI

How many grams of Na2CO3 did you add to the beaker?

2 g

What was the mass of NaCl generated after boiling off the water?

2.206 g

Given the data below, how many grams of NaCl would you expect to be formed in the reaction of excess HCl with the Na2CO3? The molar mass of sodium carbonate is 105.989 g/mol and the molar mass of sodium chloride is 58.443 g/mol.

2.481 g

The molecular weight of NaCl is 58.44 g/mol. Based on the number of grams of NaCl recovered, how many moles of NaCl were generated? Choose the closest answer.

3.774 x 10-2

You added HCl 1.00 mL at a time. When you added the last 1.00 mL amount that resulted in making bubbles, how many mL had you added?

7 mL

What was the mass of the beaker?

85 g

What was the mass of the beaker plus NaCl after boiling off the water?

87.206

How many moles of HCl were added to the reaction every time 1.00 mL of solution was added? (n = M × V). Choose the closest answer.

.006 moles

When you added the last amount of HCl that bubbled, how many moles of HCl had you added to the solution? Choose the closest answer.

.04 moles

Based on the balanced chemical equation, given that 2.000 g of Na2CO3 (molar mass = 105.989 g/mol) were added to the reaction, how many mL of H2O (molar mass = 18.02 g/mol) were produced? Remember that number of moles = mass (g) /molar mass (g/mol) and that the density of water is 1.000 g / mL. Choose the closest answer.

.3400 mL

Based on the balanced chemical equation, given that 2.000 g of Na2CO3 (molar mass = 105.989 g/mol) were added to the reaction, how many grams of CO2 (molar mass = 44.01 g/mol) were produced? Remember that number of moles = mass (g) /molar mass (g/mol). Choose the closest answer.

.8305

What was the limiting reagent for the reaction?

Na2CO3

How does Na2CO3 act as a base?

The CO2 binds with the H+ from water, forming OH- in the solution

Why did the reaction stop bubbling after adding 7.00 mL of HCl solution?

additional HCI was excess

What happened when you added HCl to the Na2CO3?

it bubbled as gas was released