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Quiz15-17

QuestionAnswer
What is a chemical reaction A chemical change resulting from a collision between molecules
What do we call the original substances that undergo a chemical reaction Reactants
What do we call the new substances produced by a chemical reaction Products
What do we call an expression that uses chemical symbols to repreent a chemical reaction Chemical equation
In a chemical equation, what do the coefficients (the large numbers before each molecular formula) represent The number of molecules of that substance that are involved in the reaction
State the law of conservation of mass as it applies to chemical reactions The total mass of the reactants is equal to the total mass of the products
Which may be changed in order to balance a chemical equation, the coefficients or the subscripts The coefficients
Why can we not change the subscripts instead to balance the equation Changing the subscripts would change the substances involved in the reaction; changing the coefficients changes only the number of each type of molecule, not the type of substance
What are ionic compounds that aare neither acids nor bases Salts
What type of ionic compounds have a sour taste, cause litmus to turn red, and can dissolve many metals Acids
What type of ionic compounds have a bitter taste, a slippery feel, cause litmus to turn blue, and can corrode many metals Bases
What is the pH of a neutral substance 7
What do we call the process of passing an electric current through an electrolyte to bring about a chemical reaction Electrolysis
What is the term for a device that produces electricity as a result of chemical reactions within it Voltaic cell
What is the most widely used type of voltaic cell Dry cell
What type of electric cell can be "recharged" by forcing electricity to flow backwards through it Storage cell
What do we call two or more electric cells joined together as a source of current Battery
What is another name for a single-displacement reaction Substitution reaction
What is the negative terminal of an electrolytic cell Cathode
What is a negative ion with the formula OH- Hydroxide
What is a negative ion with the formula H30+ Hydronium
Created by: Snyderpartyof7
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