Ques:Answer the following question given this paragraph: This situation describes the common ion effect. A common ion is an ion that is in common to both salts in a solution. In the above example, the common ion is Ca 2+ . The common ion effect is a decrease in the solubility of an ionic compound as a result of the addition of a common ion. Adding calcium ion to the saturated solution of calcium sulfate causes additional CaSO 4 to precipitate from the solution, lowering its solubility. The addition of a solution containing sulfate ion, such as potassium sulfate, would result in the same common ion effect. Q: What is an ion that is in common to both salts in a solution? Choices: - regular ion - strong ion - native ion - common ion A:

Ans:common ion
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Ques:Answer the following question given this paragraph: A solution forms when a solute dissolves in a solvent. The rate of dissolving is faster with stirring, a higher temperature, or greater surface area. Many solutes are soluble in water because water is polar. Q: What forms when a solute dissolves in a solvent? Choices: - chemical - gas - liquid - solution A:

Ans:solution
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Ques:Answer the following question given this paragraph: Vaporization is the process in which a liquid boils and changes to a gas. Q: What does liquid change to due to vaporization? Choices: - plasma - oil - solid - gas A:

Ans:gas
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Ques:Answer the following question given this paragraph: The Hubble space telescope shows that technology and science are closely related. Technology uses science to solve problems, and science uses technology to make new discoveries. However, technology and science have different goals. The goal of science is to answer questions and increase knowledge. The goal of technology is to find solutions to practical problems. Although they have different goals, science and technology work hand in hand, and each helps the other advance. Scientific knowledge is used to create new technologies such as the space telescope. New technologies often allow scientists to explore nature in new ways. Q: What is the goal of science? Choices: - improve knowledge - improve life expectancy - gain scholarships - increase knowledge A:

Ans:
increase knowledge
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