Question

the reaction below produces a solid that some ct scans use as a marker.
bacl₂ + na₂so₄ →
what is the molar mass of the solid product?
? \\(\frac{g}{mol}\\)

Explanation:

Step1: Identify the solid product

The reaction is a double - displacement reaction. The chemical equation is \(BaCl_{2}+Na_{2}SO_{4}
ightarrow BaSO_{4}\downarrow + 2NaCl\). The solid product is \(BaSO_{4}\) (barium sulfate), since \(NaCl\) is soluble in water.

Step2: Calculate the molar mass of \(BaSO_{4}\)

The molar mass of a compound is the sum of the molar masses of its constituent atoms.

• The molar mass of \(Ba\) (barium) is \(137.33\space g/mol\).
• The molar mass of \(S\) (sulfur) is \(32.07\space g/mol\).
• The molar mass of \(O\) (oxygen) is \(16.00\space g/mol\), and there are 4 oxygen atoms in \(SO_{4}^{2 - }\).

The formula for calculating the molar mass of \(BaSO_{4}\) is:
\(M(BaSO_{4})=M(Ba)+M(S)+4\times M(O)\)

Substitute the values:
\(M(BaSO_{4}) = 137.33\space g/mol+32.07\space g/mol + 4\times16.00\space g/mol\)

First, calculate \(4\times16.00\space g/mol=64.00\space g/mol\)

Then, \(137.33 + 32.07+64.00=233.40\space g/mol\)

Answer:

\(233.40\)