Identify the following salts as neutral, acidic, or basic. Drag each item to the appropriate bin. â–¸ View Available Hint(s) NH,CIO. LiF|LiNOr |KCN NHCN NHBr SrBrz Neutral salts Acidic salts Reset Help Basic salts None
The Correct Answer and Explanation is :
I am unable to directly view images. However, based on the information provided in your query, I can help you classify the salts based on whether they are neutral, acidic, or basic.
Let’s break it down:
1. NH₄Cl (Ammonium chloride):
- Acidic: Ammonium chloride is formed from the reaction of a strong acid (HCl) and a weak base (NH₃, ammonia). When dissolved in water, it dissociates into NH₄⁺ (ammonium ion) and Cl⁻ (chloride ion). The ammonium ion (NH₄⁺) acts as a weak acid and can donate protons, lowering the pH of the solution, making it acidic.
2. LiF (Lithium fluoride):
- Basic: Lithium fluoride is formed from the combination of a strong base (LiOH) and a weak acid (HF). When LiF dissolves in water, it dissociates into Li⁺ (lithium ion) and F⁻ (fluoride ion). The fluoride ion (F⁻) is a conjugate base of a weak acid, and it can accept protons from water, resulting in the formation of OH⁻ (hydroxide ions), which makes the solution basic.
3. LiNO₃ (Lithium nitrate):
- Neutral: Lithium nitrate is a salt formed from a strong base (LiOH) and a strong acid (HNO₃). Both Li⁺ and NO₃⁻ ions do not hydrolyze in water significantly, and as a result, this salt does not affect the pH of the solution, making it neutral.
4. KCN (Potassium cyanide):
- Basic: Potassium cyanide is formed from a strong base (KOH) and a weak acid (HCN). When KCN dissolves in water, it dissociates into K⁺ (potassium ion) and CN⁻ (cyanide ion). The cyanide ion is a strong conjugate base of the weak acid HCN and can accept protons from water, increasing the concentration of OH⁻ ions, making the solution basic.
5. NH₄CN (Ammonium cyanide):
- Acidic: Ammonium cyanide is formed from a weak acid (HCN) and a weak base (NH₃). In solution, NH₄⁺ (ammonium) tends to act as an acid and donate protons, while CN⁻ (cyanide) tends to act as a base and accept protons. However, the ammonium ion is generally the stronger of the two, so the overall solution will be acidic.
6. NH₄Br (Ammonium bromide):
- Acidic: Ammonium bromide is formed from a strong acid (HBr) and a weak base (NH₃). In water, NH₄⁺ (ammonium ion) will donate protons, lowering the pH and making the solution acidic.
7. SrBr₂ (Strontium bromide):
- Neutral: Strontium bromide is a salt formed from a strong base (Sr(OH)₂) and a strong acid (HBr). Similar to LiNO₃, neither Sr²⁺ nor Br⁻ significantly affect the pH of the solution, making this salt neutral.
Summary Classification:
- Acidic salts: NH₄Cl, NH₄Br, NH₄CN
- Neutral salts: LiNO₃, SrBr₂
- Basic salts: LiF, KCN
The behavior of a salt in solution depends on the relative strengths of the acid and base from which it is derived. If both are strong, the salt is typically neutral. If a strong acid and a weak base form the salt, it is acidic, and if a weak acid and a strong base form it, the salt tends to be basic.