Problem 6: An electric current passed through salt water causes the following reaction: 2NaCl(aq) + 2H₂O → Cl2(g) + H₂(g) + 2NaOH(aq) (a) Suppose you start with 100. mL salt solution. At the end, you've produced 1.20 moles of chlorine gas, and 0.25 moles of Clr of is left over. Calculate the initial concentration of NaCl in the solution. (b) What is the percent yield of the reaction in part a? 4

Why is water good at dissolving salts, and why do salts make water more conductive? Draw a model to demonstrate your answer.

More than 40% of the world's population has limited access to clean water. One proposed method for the production of clean water involves removing salt from seawater. Which technique would be used to separate the salt from the saltwater mixture?

Substance A is a liquid at room temperature, dissolves substance B, and the resulting solution can conduct electricity. Substance C does not dissolve in substance A. Which of the following statements correctly identifies the substances? Substance A and B are ionic, and substance C is non-polar. Substance A is polar molecular, substance B and Substance C are ionic. Substance A is polar molecular, substance B is ionic, and Substance C is non- polar. All three substances are polar. Substance A is non-polar molecular, substance B is polar, and Substance C is polar.

Sodium hydroxide is a substance that causes severe burns. It is used in many educational laboratory activities, but because of its hazardous nature, care must be taken to ensure its safe use in the lab. Select the statements that are true regarding the nature of sodium hydroxide and the safety precautions that should be used when handling it in the laboratory. Sodium hydroxide solutions with high concentration can cause severe burns. If sodium hydroxide is spilled on skin or clothing, the contaminated clothing should be removed immediately and the affected area should be drenched with plenty of water. Medical attention should be sought if a large area is affected, or if blistering occurs. Eye protection should be worn at all times when handling any form of sodium hydroxide. Sodium hydroxide solutions are particularly dangerous to the eyes. If sodium hydroxide is introduced to the eyes, flush the affected eye continuously with water for at least 15 min. Get medical attention…