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10 questions Chem.

10 QUESTIONS FOR CHEM. TEST Carol-Ann Copeland

Question for TestAnswers to questions
_____ Na + _____ H2O --> _____ NaOH + ____ H 2 Na + 2 H2O ---> 2 NaOH + 2 H
What does the pH scale measure? How neutral, acidic or basic solution is.
The lower the pH the ______ the acid. Stronger/More acidic
What are three ways to identify an acid. Sour taste, reaction to metals like zinc and reaction with bases.
What occurs in a chemical equation? Change in color, change in shape, formation of a precipitate, formation of a gas.
What does the arrow stand for in a chemical equation? Yield or produce.
What are reactants? Substances that are changing in a chemical equation.
What are the four physical properties we use to help identify substances? Boiling Point, Melting Point, Density and Color.
What is the boiling point for pure water at sea level? 100 degrees Celsius or 212 degrees Fahrenheit
Explain how "change in size or shape" is a physical change. The size or shape is changing but not the composition of the substance.
Created by: jcason65
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