False QUESTION 3 Which of the following pairs of substances will make a solution
ID: 558257 • Letter: F
Question
False QUESTION 3 Which of the following pairs of substances will make a solution based on the "like dissovles like" concept? (Select llthat apply) iodine (12) mixed with water sodium iodide (Nal) mixed with water bromine liquid (Br2) mixed with carbon tetrachloride (CC14) lithium carbonate (Li2CO3) in bromine liquid (Br2) QUESTION 4 Which of the following substances would be a non-electrolyte? (Select all that apply) HCI CH2Cl2 QUE STION 5 Which of the following electrolytes would produce the most ions when dissolved in water?Explanation / Answer
3.
Iodine is a non-polar covalent compound and water is a polar solvent. Hence they don't mix.
sodium iodide is an ionic bond and the polarity of water forms immediate bonds with it.So it mixes with water.
bromine is a non polar covalent molecule and ccl4 is also a non polar covalent molecule. So like dissolves like.
Lithium bromide is an ionic non-polar compound, and bromine is a covalent polar compound. So they don't mix.
4.
HCl is a strong acid, so it is an electrolyte.
Na2S can dissociate into Na+ and S2- ions, hence it is a strong electrolyte.
CH2Cl2 doesn't dissociate and hence it is a non electrolyte.
CH3COOH is a weak electrolyte since it weakly dissociates into CH3COO- and H+
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