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science review 3

QuestionAnswer
When substances break apart or combine to form one or more new substances? chemical reaction
The solid substance that forms in a solution? precipitate
Give three signs of a chemical reaction. color,gas,state change liquid to solid etc.
A reaction that gives off energy? exothermic
A compound that increases the number of hydronium ions dissolved in water is called? acid
what is the flavor of acids? sour
Why should a person NEVER taste or touch an unknown chemical? it may be corrosive
a compound that can reversibly change color depending on conditions such as pH is called? indicator
two commonly used indicators are bromythymol blue and ? litmus paper
what color does blue litmus paper turn when acid is added to it? red
Is rubber an acid or a base? acid
Are car batteries and acid or base? acid
Is orange juice and acid or base? acid
Is bar soap and acid or base? base
Is baking soda and acid or base? base
Any compound that increases the number of hydroxide ions when dissolved in water is called ? base
Bases are have a bitter taste and feel_________? slippery
What color does a base change red litmus paper to? blue
Because bases increase the number of of hydroxide ions, solutions of bases can conduct _____? electricity
Antacids (tums or rolaids) are an acid or base? base
The interaction that holds atoms and ions together is called? chemical bond
a compound made of oppositely charged ions? ionic compound
a compound formed by sharing of electrons? covalent compound
electrons in the outermost energy level of an atom? valence electron
a repeating three dimensional pattern? crystal lattice
the smallest particle into which a covalently bonded compound can divided and still be the same compound? molecule
the reaction of an acid and a base to form a neutral solution of water and salt is called? salt
Created by: dixonl