Which of the following compounds will be more soluble in acidic solution than in

Question

Which of the following compounds will be more soluble in acidic solution than in pure water? A. KNO_2 B. Fel_3 C. Ni(NO_3)2 D. None of the listed compounds will be more soluble in acidic solution. E. BaCI_2 One of the methods of removing hardness from water is to use an ion-exchange resin, which is the method used in water filter cartridges. Which one of the following statements about ion-exchange resins is correct? A. Calcium ions in the water are replaced by sodium ions from the resin. B. None of these answer choices are correct. C. Chloride and magnesium ions in the water are replaced by calcium ions from the resin. D. Magnesium ions in the water are replaced by calcium ions from the resin. E. Calcium ions in the water are replaced by chloride ions from the resin.

Explanation / Answer

species which is having more basic will soluble in acid more

no you should know which is more basis

salt which are formed from the week acid is strong base according to conjugate acid base theory

so first HNo2 is correct answer

6.

first option is correct

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