Comparing E262 - Sodium acetates vs E237 - Sodium formiate
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Popular questions
What is e262 in food?
E262 is sodium acetates (sodium acetate and sodium diacetate), used as a preservative and acidity regulator to control pH and inhibit microbial growth.
What is sodium acetates formula?
Sodium acetate is CH3COONa (anhydrous) or CH3COONa·3H2O (trihydrate); sodium diacetate (E262(ii)) is CH3COONa·CH3COOH.
What is sodium acetates symbol?
Chemically it’s written as CH3COONa (often abbreviated NaOAc); on food labels the code is E262.
Where is area cod e262?
E262 isn’t an area code—it’s the EU food additive number for sodium acetates shown on ingredient lists.
Why are sodium bicarbonate and sidium acetates?
Both are sodium salts of weak acids used in foods: sodium bicarbonate acts as a leavening agent/acid neutralizer, while sodium acetates preserve foods and help regulate acidity.
Is sodium formate an acid or base?
It’s the sodium salt of formic acid; in water the formate ion acts as a weak base, so its solutions are mildly basic.
Is sodium formate a strong base?
No—it's a weak base; the formate ion only hydrolyzes slightly in water (formic acid pKa ≈ 3.75).
. what is the effect on equilibrium when sodium formate is added to a solution of formic acid?
It adds the common ion (formate), shifting HA ⇌ H+ + A− to the left, suppressing dissociation and creating a buffer; the solution becomes less acidic than pure formic acid.
1l solution of .05m sodium formate. what is final ph if 12ml of 1.0m hcl is added?
About pH 4.25. Reaction converts 12 mmol formate to formic acid, leaving ~38 mmol A− and 12 mmol HA; with pKa ≈ 3.75, pH ≈ 3.75 + log(38/12) ≈ 4.25.
Determind how much formic acid and sodium formate to make buffer?
Specify the target pH and total buffer concentration, then use Henderson–Hasselbalch: [A−]/[HA] = 10^(pH − pKa). For example, at pH 4.25 with 0.10 M total buffer in 1 L, you’d need ~0.076 mol sodium formate and ~0.024 mol formic acid.