caco3 + kno3 =0.301g
resalt soild 0.197g
co2:o2 ?
To determine the ratio of CO2 to O2 produced in the reaction, we first need to calculate the moles of CO2 and O2 produced.
Step 1: Convert the given masses of CaCO3 and KNO3 to moles.
- The formula mass of CaCO3 is 100.09 g/mol (atomic masses: Ca=40.08, C=12.01, O=16.00)
- The formula mass of KNO3 is 101.11 g/mol (atomic masses: K=39.10, N=14.01, O=16.00)
Moles of CaCO3 = mass / formula mass = 0.301 g / 100.09 g/mol = 0.003 mol
Moles of KNO3 = mass / formula mass = 0.301 g / 101.11 g/mol = 0.003 mol
Step 2: Based on the balanced chemical equation, determine the moles of CO2 and O2 produced. The balanced equation is:
CaCO3 + 2KNO3 -> Ca(NO3)2 + CO2 + K2O
From the equation, we see that 1 mole of CaCO3 produces 1 mole of CO2.
Moles of CO2 formed = 0.003 mol
Step 3: Calculate the moles of O2 produced.
From the balanced equation, we see that 1 mole of CaCO3 reacts with 2 moles of KNO3, giving 2 moles of K2O and 2 moles of NO3.
Therefore, 1 mole of KNO3 produces 1 mole of K2O and 2 moles of NO3.
To produce 2 moles of NO3, we need 1 mole of O2 because each NO3 contains 1 O2.
Moles of O2 formed = 2 * 0.003 mol = 0.006 mol
Step 4: Calculate the ratio of CO2 to O2.
The ratio is determined by dividing the moles of CO2 by the moles of O2.
Ratio of CO2 to O2 = Moles of CO2 / Moles of O2 = 0.003 mol / 0.006 mol = 0.5
Therefore, the ratio of CO2 to O2 is 1:0.5 or 2:1