First you have to find the number of moles , then you have to apply stoichometry to find the number of moles of H2 gas , after that you can determine its mass.
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Answer:
Products: C6H5COO-Na+ (aq) + H2O (l)
Explanation:
when the benzoic acid react with sodium hydroxide, the acid part i.e carboxyl group is react with the base and produce ionic compound sodium benzoate (C6H5COO-Na+).
Chemical equation:
C6H5COOH + NaOH → C6H5COO-Na+ + H2O
Chemical reaction with physical states:
C6H5COOH (s) + NaOH (aq) → C6H5COO-Na+ (aq) + H2O (l)
Sodium benzoate is very polar ionic compound and soluble in water. If we add HCl into this solution sodium benzoate will be converted back into benzoic acid.
Properties of benzoic acid:
1. it is colorless solid.
2. it is crystalline in nature.
3. it is aromatic compound with the formula C7H6O2.
4. it is soluble into benzene, alcohol and ether.
5. its molar mass is 122.12 g/mol.
Properties of sodium benzoate:
1. Sodium benzoate is white odorless chemical compound.
2. It is aromatic compound and molecular formula is C7H5NaO2.
3. Its molecular weight is 144.11 g/mol.
4. it is sweet in taste and soluble in water.
5. it is used as preservative because of its antimicrobial properties.
Properties of Sodium hydroxide:
1. it is colorless solid and inorganic compound.
2. it is crystalline in nature.
3. its molar mass is 40 g/mol.
4. its molecular formula is NaOH.
5. its melting point is 318 °C.
