Science Midterm Chapter 13 (add important questions from ur slides) Flashcards
What are the two categories that make up substances?
Elements and Compounds
Chlorine, Oxygen, and Carbon are all examples of what type of substance?
Elements
True or False: Compounds can be physically separated.
False
Is the composition of substances always the same or different?
Same
True or False: Elements have ionic and covalent bonds.
False
What are the two types of mixtures?
Homogeneous and Heterogeneous
What is another name for a homogeneous mixture?
Solution
True or False: The particles that make up a homogeneous are unevenly mixed.
False
Mixing is a ______ change.
Physical
What is an acid?
A substance that produces a hydronium ion when dissolved in water.
Can mixtures be separated, and by what method?
Yes, Physical
What is a hydronium ion?
A positively charged ion formed when an acid dissolves in water.
What are the two parts of a solution?
Solvent, Solute
Nearly all acid molecules contain one or more _______ atoms.
Hydrogen
What part of a solution exists in the greatest quantity?
Solvent
When an acid mixes with _______, the ________ atom separates from the acid.
Water, Hydrogen
What is the chemical formula for a hydronium ion?
H₃O⁺
What is a base?
A substance that produces hydroxide ions when dissolved in water.
What is a hydroxide ion?
A negatively charged ion formed when a base dissolves in water.
What is one practical use of bases in everyday life?
Cleansers like shampoo, dish detergent, and window cleaner.
What type of taste do bases add to food?
Bitterness
What is the chemical formula for a hydroxide ion?
OH-
True or False: Solutions can exist in all three states of matter.
True
True or False: Water almost always exists as a solution.
True
Like dissolves _______.
Like
