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2 years ago

The double replacement reaction between calcium nitrate (Ca(NO3)2) and potassium oxide (K2O ) is shown below:

Chemistry

1 answer:

Llana [10]2 years ago

8 0

Answer:

Mass = 2.355 g

Explanation:

Given data:

Mass of K₂O needed = ?

Mass of KNO₃ produced = 5.00 g

Solution:

Chemical equation:

K₂O + Ca(NO₃)₂ → CaO + 2KNO₃

Number of moles of KNO₃:

Number of moles = mass/molar mass

Number of moles = 5.00 g/ 101.1 g/mol

Number of moles = 0.05 mol

now we will compare the moles of KNO₃ and K₂O.

KNO₃ : K₂O

2 : 1

0.05 : 1/2×0.05 = 0.025 mol

Mass of potassium oxide needed in gram:

Mass = number of moles × molar mass

Mass = 0.025 mol × 94.2 g/mol

Mass = 2.355 g

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3 years ago

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2 years ago

The double replacement reaction between calcium nitrate (Ca(NO​3​)​2)​ and potassium oxide (K​2O​ ) is shown below:

The double replacement reaction between calcium nitrate (Ca(NO3)2) and potassium oxide (K2O ) is shown below: