The formula-unit equation for this first reaction in the series or reactions tha

Question

The formula-unit equation for this first reaction in the series or reactions that you will perform in this experiment is: 2AI(s) + 6H_2O(l) + 2KOH(aq) rightarrow 2 K[Al(OH))4)(aq) + 3H_2(g) When sulfuric acid is slowly added to the resulting alkaline solution of this initial product, a portion of the acid acts to neutralize the excess potassium hydroxide and to convert it to potassium sulfate and water. The formula- unit equation for this reaction is: 2KOH(aq) + H_2SO_4(aq) rightarrow K_2SO_4(aq) + 2H_2O(l) As additional sulfuric acid is added, one hydroxide ion is removed from each potassium tetrahydroxoaluminate(lll) causing the precipitation of white, gelatinous, semi-solid aluminum hydroxide, Al(OH)_3. When more sulfuric acid is added, the aluminum hydroxide dissolves to form a warm solution of soluble aluminum sulfate. 2AI(OH)_3(s) + 3H_2SO_4(aq) rightarrow AI_2(SO_4)_3(aq) + 6H_2O(l) The warm aluminum sulfate solution also contains potassium sulfate from the previous step. If the solution is cooled, potassium aluminum sulfate dodecahydrate ("Alum") precipitates. Sometimes a seed crystal is needed to initiate the precipitation. Al_2 (SO_4)_3(aq) + K_2SO_4(aq) + 24H_2O(l) rightarrow 2K[Al(SO_4)_2]*12H_2O(s) If the equations for the above steps are combined, a single overall equation that represents the overall chemical conversion of aluminum to alum is formed. How would you modify the current procedures to produce the product: NaCr(SO_4)_2 . 12H_2O(s)?

Explanation / Answer

Balanced equation for synthesis of NaCr(SO4)2.12H2O is

Na2SO4 (aq) + Cr2(SO4)3 (aq) + 24 H2O (l) ----------> 2 NaCr(SO4)2.12H2O (s)

Related Questions

Navigate

• Browse (All)
• Browse T
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.