Is sodium benzoate soluble in HCl? I put yes
What about NaOH? It's supposed to be created from a reaction with benzoic acid and NaOH
What about NaHCO3?
And aq. sodium benzoate plus HCl?
And aq. sodium benzoate plus NaOH?
To determine the solubility of sodium benzoate (NaC7H5O2) in different solutions, we need to understand the chemical properties of sodium benzoate and the reactions it undergoes with various substances.
1. Solubility of Sodium Benzoate in HCl:
When sodium benzoate is added to hydrochloric acid (HCl), it will undergo a neutralization reaction. Sodium benzoate (NaC7H5O2) is a salt of benzoic acid (C7H6O2) and sodium hydroxide (NaOH). In the presence of HCl, the acid-base reaction will occur, resulting in the formation of water, sodium chloride (NaCl), and benzoic acid (C7H6O2). Consequently, the solubility of sodium benzoate in HCl is low because it will react with the acid to form benzoic acid, which is sparingly soluble in water.
2. Solubility of Sodium Benzoate in NaOH:
As you correctly mentioned, sodium benzoate can be formed by reacting benzoic acid and sodium hydroxide (NaOH). NaOH is a strong base, while benzoic acid is a weak acid. In this case, sodium benzoate will readily dissolve in NaOH to form sodium benzoate (NaC7H5O2) salt, which is a soluble form of the compound. Hence, sodium benzoate is soluble in NaOH.
3. Solubility of Sodium Benzoate in NaHCO3:
Sodium bicarbonate (NaHCO3) is commonly known as baking soda and is primarily used as a leavening agent. Sodium benzoate is also soluble in NaHCO3. When sodium benzoate is added to a solution of NaHCO3, it will undergo a reaction, where sodium benzoate will dissociate into its components, sodium ions (Na+) and benzoate ions (C7H5O2-). These ions will dissolve in the NaHCO3 solution, making sodium benzoate soluble.
4. Solubility of Aqueous Sodium Benzoate in HCl or NaOH:
When solid sodium benzoate is dissolved in water to form an aqueous solution, it dissociates into sodium ions (Na+) and benzoate ions (C7H5O2-). Regardless of whether HCl or NaOH is added to the aqueous sodium benzoate solution, the solubility of sodium benzoate will not change. Since sodium benzoate is already in its ionic form in an aqueous solution, it will remain soluble, regardless of the presence of HCl or NaOH.
In summary:
- Sodium benzoate is not soluble in HCl because it reacts with the acid to form benzoic acid, which is sparingly soluble.
- Sodium benzoate is soluble in NaOH because it forms a salt with NaOH.
- Sodium benzoate is soluble in NaHCO3 because it dissociates into ionic components in the solution.
- Aqueous sodium benzoate remains soluble regardless of the presence of HCl or NaOH.