Hydrogen Fluoride (HF) is an inorganic compound . Acetic acid or ethanoic acid (CH3COOH) is a weak inorganic acid with the common name vinegar. Let us look into their reaction.
HF in an aqueous solution produces hydrofluoric acid, a weak acid, unlike other hydrohalides. HF is used in synthetic chemistry, for preparing herbicides, refrigerants etc. On the other hand, CH3COOH is used in homes as food preservative and in producing methyl acetate, acetic anhydride, cellulose acetate etc.
In this article, HF and CH3COOH reaction will be studied.
What is the product of HF and CH3COOH?
In HF + CH3COOH reaction, acetyl fluoride (CH3COF) and water (H2O) গঠিত হয়
HF (aq) + CH3COOH = CH3COF + H2O
What type of reaction is HF + CH3COOH?
HF + CH3COOH reaction is an example of a দ্বিগুণ স্থানচ্যুতি প্রতিক্রিয়া.
How to balance HF + CH3COOH?
HF + CH3COOH reaction is-
HF (aq) + CH3COOH = CH3COF + H2O
The number of Hydrogen, Carbon, Oxygen and Fluorine atoms on the reactant and product sides are 5, 2, 2 and 1, respectively. Thus the reaction is balanced.
HF + CH3COOH টাইট্রেশন
HF + CH3COOH titration is a acid-base titration, because the acidic HF undergoes neutralization with CH3COOH, where HF act as a strong acid, and CH3COOH as a weak base.
ব্যবহৃত যন্ত্রপাতি
Burette, Pipette, Beaker, ড্রপার।
ইনডিকেটর
Methyl orange is used as an indicator in HF + CH3COOH টাইট্রেশন, টিhe pH range of which is 3 (red) to 5 (yellow in basic).
কার্যপ্রণালী
- Take HF with known normality in the burette
- A particular volume of CH3COOH is taken in a beaker using a pipette
- Drops of methyl orange are added
- Titrate against HF
- A color change from yellow to red indicates an equivalence point. Note it down
- Repeat the procedure for concordant values
- Normality of CH3COOH is calculated using equation; NHFVHF=NCH3COOHVCH3COOH
HF + CH3COOH নেট আয়নিক সমীকরণ
এর নেট আয়নিক সমীকরণ HF + CH3COOH প্রতিক্রিয়া হল-
H+ (aq) + F- (aq) + CH3COOH (aq) = CH3COF (l) + H2O (ঠ)
Steps included in deriving ionic equation are as follows;
- Consider the balanced equation with physical states;
- HF (aq) + CH3COOH (aq) = CH3COF (l) + H2O (ঠ)
- Only comparatively strong electrolyte, HF is dissociating into proton and fluoride ions. Then, equation becomes;
- H+ (aq) + F- (aq) + CH3COOH (aq) = CH3COF (l) + H2O (ঠ)
- Acetic acid is not completely dissociated as it is a weak electrolyte.
- No common ions are present to cancel out in this reaction.
- Thus, net ionic eqution is;
- H+ (aq) + F- (aq) + CH3COOH (aq) = CH3COF (l) + H2O (ঠ)
HF + CH3COOH কনজুগেট জোড়া
Conjugate acid-base pairs of HF + CH3COOH reaction সদস্যরা হলেন-
HF (l)+ CH3COOH = CH3COOH2+ + ফ-
- The conjugate base of HF is F-
- CH3COOH2 acts as the conjugate acid of CH3COOH
HF and CH3COOH আন্তঃআণবিক শক্তি
The intermolecular forces in HF + CH3COOH সদস্যরা হলেন-
- In HF + CH3COOH, hydrogen bonding is present as an আন্তঃআণবিক বল. Because, HF is a polar molecule due to electronegativity differences between H and Br.
- Strong hydrogen bonding is present in HF.
- Dipole-dipole interaction is also present, because, CH3COOH is a dipole molecule.
HF + CH3COOH প্রতিক্রিয়া এনথালপি
In HF + CH3COOH reaction, the enthalpy is +99.67 KJ/mol, where-
- Enthalpy of formation of HF, H1= -320.13 KJ/mol
- Enthalpy of formation of CH3COOH, H2= -484.13 KJ/mol
- Enthalpy of formation of CH3COF, H3= -463.71 KJ/mol
- এইচ গঠনের এনথালপি2O, H4=-285.83 KJ/mol
- Thus, reaction enthalpy is calculated as-
- Hr = [H4+ H3]-[H1+ H2]
- = [-285.83 +-463.71]-[-320.13 + -484.13] KJ/mol
- = +99.67 KJ/mol
Is HF + CH3COOH একটি বাফার সমাধান?
HF + CH3COOH একটি নয় বাফার সমাধান, because HF is highly acidic, whereas CH3COOH acts as a base and decreases its acidity.
Is HF + CH3একটি সম্পূর্ণ প্রতিক্রিয়া COOH?
HF + CH3COOH is a complete reaction. It is because one molecule of each reactant undergoes a complete reaction to form CH3COF and H2O as products.
Is HF + CH3COOH একটি এক্সোথার্মিক বা এন্ডোথার্মিক প্রতিক্রিয়া?
HF + CH3COOH হল একটি এন্ডোথার্মিক প্রতিক্রিয়া. It is because the reaction takes place by consuming energy, as indicated by the positive value of reaction enthalpy (+99.67 KJ/mol).
Is HF + CH3COOH একটি redox প্রতিক্রিয়া?
HF + CH3COOH একটি নয় রেডক্স reaction due to no change in the oxidation states of species.
Is HF + CH3COOH একটি বৃষ্টিপাত প্রতিক্রিয়া?
HF + CH3COOH reaction is not precipitation as no precipitate is formed as a product.
Is HF + CH3COOH বিপরীত বা অপরিবর্তনীয় প্রতিক্রিয়া?
HF + CH3COOH হল a উলটাকর reaction when liquid HF is used and it reaches equilibrium after a time, t. The equilibrium reaction is-
HF (Liq) + CH3COOH <=> CH3COOH2+ + ফ-
Is HF + CH3COOH displacement reaction?
HF + CH3COOH is a displacement reaction because the F- এবং ওএইচ- ions are getting displaced in this reaction.
উপসংহার
In the reaction of HF and CH3COOH, the acetic acid acts as a basic substance when liquid HF is present as solvent. The reaction attains equilibrium. With aqueous HF, acyl fluoride (CH3COF) and water are formed as a product.
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