True or False Question 2 (Answers Revealed)
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1. Chloride ions in water can react with silver ions to form a deep red precipitate with very low solubility. (Incorrect) 2. Oxygen is a flammable gas. (Incorrect) 3. In redox reactions, the substance that loses electrons is called an oxidizing agent, while the substance that gains electrons is called a reducing agent. (Incorrect) 4. The concentration of an acid refers to the total concentration of acids in the solution, including both the concentration of undissociated acids and that of dissociated acids. (Correct) 5. A 0.001 mol/L HCl solution has a pH of 3. (Correct) This post was last edited by Canghai Yili Sha on 2009-3-7 08:21]
1. Chloride ions in water can react with silver ions to form a deep red precipitate with very low solubility. (×) 2. Oxygen is a flammable gas. ( × ) 3. In redox reactions, the substance that loses electrons is called an oxidizing agent, while the substance that gains electrons is called a reducing agent. ( × ) 4. The acid concentration refers to the total concentration of acids in the solution, including both the concentration of undissociated acids and that of dissociated acids. ( √ ) 5. A 0.001 mol/L HCl solution has a pH of 3. ( √ )
Question 1: Wrong, White. Question 2: Wrong. Question 3: Reversed. Question 4: Wrong
1 (Wrong) White precipitate. 2 (Wrong) Oxidizing gas. 3 (Wrong) An oxidizing agent gains electrons, while a reducing agent loses electrons. 4 (Wrong) The concentration of an acid is also known as its analytical concentration; it refers to the amount of substance of that acid per unit volume of solution (in moles), including both the undissociated and dissociated forms of the acid. Acidity refers to the concentration or activity of H+ ions in a solution, commonly expressed as pH. 5 (correct)
1.X 2.X 3.X 4.X 5.√
1. Chloride ions in water can react with silver ions to form a deep red precipitate with very low solubility. (Incorrect) 2. Oxygen is a flammable gas. (Incorrect) 3. In redox reactions, the substance that loses electrons is called an oxidizing agent, while the substance that gains electrons is called a reducing agent. ( Wrong ) 4. The acid concentration refers to the total concentration of acids in the solution, including both the concentration of undissociated acids and that of dissociated acids. (Incorrect) 5. A 0.001 mol/L HCl solution has a pH of 3. ( Right )
1. Wrong 2. Wrong 3. Wrong 4. Wrong 5. Right Last edited by fanxh on 2009-3-6 10:46]
1.X 2.X 3.X 4.X 5.√
1. Wrong. I remember it was a white precipitate. 2. Wrong. According to the previous definition; I’m not sure if it has been changed now. 3. Wrong. It seems it’s reversed. 4. Right. 5. Wrong. It seems it should be less than 3; I’m not sure if the degree of ionization of hydrochloric acid is 100%, but in any case it shouldn’t equal 3.
1. Chloride ions in water can react with silver ions to form a deep red precipitate with very low solubility. (Incorrect) 2. Oxygen is a flammable gas. (Incorrect) 3. In redox reactions, the substance that loses electrons is called an oxidizing agent, while the substance that gains electrons is called a reducing agent. ( Wrong ) 4. The acid concentration refers to the total concentration of acids in the solution, including both the concentration of undissociated acids and that of dissociated acids. (Incorrect) 5. A 0.001 mol/L HCl solution has a pH of 3. ( Right )
1 wrong, 2 wrong, 3 wrong, 4 wrong, 5 correct (basically); pH should be written as pH
1. Wrong 2. Wrong 3. Wrong 4. Wrong 5. Right
All wrong: handshake
1. Wrong, it is a white precipitate. 2. Wrong, it is an oxidizing agent. 3. Wrong, it is the oxidizer that gains electrons. 4. Right. 5. Right.
1. Chloride ions in water can react with silver ions to form a deep red precipitate with very low solubility. (Incorrect) 2. Oxygen is a flammable gas. (Incorrect) 3. In redox reactions, the substance that loses electrons is called an oxidizing agent, while the substance that gains electrons is called a reducing agent. ( Wrong ) 4. The acid concentration refers to the total concentration of acids in the solution, including both the concentration of undissociated acids and that of dissociated acids. (Yes) 5. A 0.001 mol/L HCl solution has a pH of 3. ( Right )