Discovering Design Chemistry Chapter 11

What is an indicator?

• A chemical that undergoes a distinct, observable change (usually a color change) when the conditions in its solution change.
• A chemical that donates an H+
• A chemical that accepts an H+
• The process by which an acid of known concentration is added to a base of unknown concentration (or vice-versa) until a neutral pH is reached so as to determine the unknown concentration.

What is an acid?

• A chemical that undergoes a distinct, observable change (usually a color change) when the conditions in its solution change.
• A chemical that donates an H+
• A chemical that accepts an H+
• The process by which an acid of known concentration is added to a base of unknown concentration (or vice-versa) until a neutral pH is reached so as to determine the unknown concentration.

What is a base?

• A chemical that undergoes a distinct, observable change (usually a color change) when the conditions in its solution change.
• A chemical that donates an H+
• A chemical that accepts an H+
• The process by which an acid of known concentration is added to a base of unknown concentration (or vice-versa) until a neutral pH is reached so as to determine the unknown concentration.

What is acid/base titration?

• A chemical that undergoes a distinct, observable change (usually a color change) when the conditions in its solution change.

• A chemical that donates an H+

• A chemical that accepts an H+

• The process by which an acid of known concentration is added to a base of unknown concentration (or vice-versa) until a neutral pH is reached so as to determine the unknown concentration.

What is amphoteric?

• A chemical that donates an H+
• A chemical that accepts an H+
• Capable of reacting as either an acid or a base.
• An acid that can donate two or more H+ ions.

What is a polyprotic acid?

• A chemical that donates an H+
• A chemical that accepts an H+
• Capable of reacting as either an acid or a base.
• An acid that can donate two or more H+ ions.

What are the characteristics of an acid? Choose all that apply

• tend to taste sour
• are covalent electrolytes
• turn blue litmus paper red
• tend to taste bitter
• feels slippery when mixed with water

What are the characteristics of a base? Choose all that apply

• tend to taste bitter
• feels slippery when mixed with water
• turn red litmus paper blue
• tend to taste sour
• are covalent electrolytes

Ionic compounds that contain the hydroxide ion (OH) act as ________ and accept the H+ ion to form ________.

• acids, bases
• bases, acids
• bases, water
• water, acids

NH3 (ammonia) is the most common _______

• covalent base
• acid
• amphiprotic molecule
• none of these