Examkin

Soru

Zorluk: OrtaFiltration, Evaporation, and Crystallization

Match each mixture separation requirement on the left with the most appropriate physical technique on the right.

  • Separating insoluble calcium carbonate particles suspended in waterFiltration
  • Recovering thermally stable anhydrous sodium chloride from an aqueous salt solutionEvaporation to dryness
  • Obtaining pure hydrated copper(II) tetraoxosulfate(VI) crystals from an aqueous solutionCrystallization

Cevap

Separating insoluble calcium carbonate from water pairs with Filtration; recovering thermally stable sodium chloride pairs with Evaporation to dryness; obtaining pure hydrated copper(II) tetraoxosulfate(VI) crystals pairs with Crystallization.
Filtration is used for separating insoluble solids from liquids because the solid residue remains on the filter medium. Evaporation to dryness is appropriate for thermally stable soluble solids where heating does not cause chemical decomposition. Crystallization is necessary for thermally unstable or hydrated salts to preserve their crystalline structure and water of crystallization upon controlled cooling of a saturated solution.

Adım Adım Çözüm

1
Analyze the solubility and physical state of the component in 'Separating insoluble calcium carbonate particles suspended in water'.
Calcium carbonate (CaCO3\text{CaCO}_3) is an insoluble solid suspended in liquid water. The appropriate method to separate an insoluble solid from a liquid is filtration.
Filtration relies on particle size differences where the insoluble residue is trapped on filter paper while the liquid filtrate passes through.
2
Analyze the thermal stability of 'Recovering thermally stable anhydrous sodium chloride from an aqueous salt solution'.
Sodium chloride (NaCl\text{NaCl}) is a soluble, heat-stable solid that does not decompose upon heating. Evaporating to dryness removes all water leaving dry salt.
Evaporation to dryness is suitable when the solute does not decompose at high temperatures and water of crystallization is not required.
3
Analyze the composition of 'Obtaining pure hydrated copper(II) tetraoxosulfate(VI) crystals from an aqueous solution'.
Copper(II) tetraoxosulfate(VI) pentahydrate (CuSO4⋅5H2O\text{CuSO}_4\cdot 5\text{H}_2\text{O}) contains water of crystallization and decomposes/dehydrates if heated to dryness. It requires gentle heating to form a saturated solution, followed by slow cooling.
Crystallization preserves the hydration structure and purity of thermally sensitive hydrated salts.

Anahtar Kavram

Selection of physical separation methods based on solid solubility, liquid interaction, and thermal stability of hydrated salts.
Bu soruyu puanla

Konular

Filtration, Evaporation, and Crystallization