46. Which of the following ionic compounds is most likely to be insoluble in wat

Question

46. Which of the following ionic compounds is most likely to be insoluble in water? Cas b) Ca (NO3)2 c) Naso. d) KI e) NaOH 47. When a hot-pack is activated, a chemical reaction occurs and the temperature of the pack contents rises. Which of the following is a correct description of the reaction occurring in the pack? d) The reaction is endothermic; AHKo al The reaction is exothermic; AH 0 e) None of these statements is correct. b) The reaction is exothermic; AHKO c) The reaction is endothermic; AH 0

Explanation / Answer

CaS is not soluble in water. It reacts with water according to CaS(s) + 2HOH --> H2S(aq) + Ca(OH)2(aq).

All nitrates are soluble, NaOH is highly soluble and KI also.

2. Exothermic reactions are characterized by negatvie change in enthalpy. So deltaH<0.

Related Questions

Navigate

• Browse (All)
• Browse 4
• Subjects

---

---

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