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Acids and Bases Ch 20,21
Review for Ch 20 and Ch 21 test
72
Chemistry
10th Grade
03/17/2010

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Cards

Term
Which ion(s) have the wrong charge? Na+, Mg+ or Al+ ?
Definition
Mg+ should be Mg2+ and Al+ should be Al3+    Charges are at the top of the columns of the periodic table.
Term
Ionic compounds are made of:
Definition
positive ions and negative ions.
Term
Ions form when neutral atoms gain or lose:
Definition
electrons, in order to be like a noble gas.
Term
Ionic compounds always start with a:
Definition
metal, except for the one polyatomic NH4+1
Term
Which ion(s) have the wrong charge? Li-, O 2- , S2+ ?
Definition
Li should be Li1+, and sulfur should be S2-.  The charges are at the top of the periodic table.
Term
Which of the following polyatomics is correct? NH+4, OH-1, PO3-2 ?
Definition
OH-1 you may use the polyatomic chart on the test.
Term
What does the suffix ‘-ate’ or ‘ite’ indicate in the name of the compound?
Definition
that there is a polyatomic for the anion, and there are oxygens in the polyatomic.
Term
hydrogen ions or also called hydronium ions
Definition
What acids release into the water in which they are dissolved.
Term
If an acid’s anion ends with ‘–ide’ such as
Definition
The prefix ‘hydro’ is used in the acid name.
Term
HCl(gas)= hydrogen chloride gas THEN:
Definition
HCl(gas) in water causes the water to be called hydrochloric acid.
Term
If a polyatomic is the anion of the acid, then:
Definition
There’s NO prefix of ‘hydro’.
Term
If an acid’s polyatomic ends with ‘-ate’ such as H2SO4 = hydrogen sulfate THEN:
Definition

The acid’s name ends with ‘-ic’.

hydrogen sulfate  = H2SO4 = sulfuric acid

Term
If an acid’s polyatomic ends with ‘ite’ such as H2SO3 = hydrogen sulfite THEN:
Definition

The acid’s name ends with ‘-ous’.

hydrogen sulfite = H2SO3 =  sulfurous acid

Term
Phosphoric acid is: Phosphorous acid is:
Definition

hydrogen phosphate = H3PO4= Phosphoric acid

hydrogen phosphite = H3PO3= Phosphorous acid

Term
sour taste, electrolyte, litmus paper(pink), reacts with bases to make water and salt
Definition
properties of acids
Term
slippery, bitter taste, electrolyte, litmus paper(blue), reacts with acids to make water and salt
Definition
properties of bases
Term
1+ is the charge of which acid ion? NH4 or H3O
Definition

H3O1+ is called ‘hydronium ion’ & is acidic.

NH41+ is called ‘ammonium ion’ and is a base.

Term
If the hydrogen ion concentration is 1 x 10-9M then the solution is:
Definition
a base with a pH of 9.
Term
If the hydrogen ion concentration is 1 x 10-4M, then the solution is:
Definition
an acid with a pH of 4.
Term
If the hydrogen ion concentration is 1 x 10-4M, then what is the hydroxide ion concentration?
Definition
[OH-] = 1 x 10-10M and has a pH of 4.
Term
If the hydroxide ion concentration is 1 x 10-6 M, then the hydrogen ion concentration is:
Definition
[H+] = 1 x 10-8 M and has a pH of 8.
Term
The symbol for ‘concentration’ is:
Definition
brackets…[ ]
Term
The concentration of hydronium ions in a neutral solution is:
Definition
[H+] = 1 x 10-7 M and has a pH of 7.
Term

The formula for pH is: example,

hydronium concentration = [2.8 x 10-3M]

Definition

pH = -log [H ion] and would be keyed into the calculator as:

2.8 EE 3 ± log ± = 2.6 and would be acidic

Term

What is the pH of a solution that has a

hydronium concentration of 4.8 x 10-7M?

Definition
4.8 EE 7 ± log ± = 6.3 and would be acidic
Term

What is the pH of a solution that has a

hydronium concentration of 1.3 x 10-9M?

Definition
1.3 EE 9 ± log ± = 8.8 and would be basic
Term
What is the pH of [10-11M]?
Definition
1 EE 11 ± log ± = 11 and would be basic
Term
When the pH of a solution is between 0 and 6.99, the solution is:
Definition
acidic, pH < 7
Term
When the pH of a solution is between 7.1 and 14, the solution is:
Definition
basic, pH > 7
Term
When the pH of a solution is exactly 7 the solution is:
Definition
neutral
Term

When the hydronium ion concentration is 

1x10-7M.

Definition
neutral or pH 7.
Term
pH 3 is ten times _____ than pH 4
Definition
more concentrated, both are acids
Term
pH 6 is ten times _____ than pH 5
Definition
more diluted, both are acids
Term
pH 9 is ten times _____than pH 8
Definition
more concentrated. both are bases
Term
pH 8 is 100 times ______ than pH 10
Definition
more diluted, both are bases
Term
‘diluted’ means
Definition
watered down
Term
‘strong’ acid means
Definition
ionizes completely in water….example: HCl and H2SO4
Term
‘weak’ acid means
Definition
doesn’t ionize completely in water…some of the + and – ions won’t let go of each other….example: vinegar
Term
‘strong’ base means
Definition
ionizes completely in water….example: NaOH
Term
‘weak’ base means
Definition
doesn’t ionize completely in water…some of the + and – ions won’t let go of each other…..examples: NH4+
Term
acid + base =
Definition
salt + water
Term
ionic compounds are always called:
Definition
salts
Term
Acids start with a ________ that is acting like a metal.
Definition
hydrogen
Term
Bases usually end with the polyatomic….
Definition
hydroxide or (OH)
Term
What is a titration?
Definition
a way to figure the concentration of an acid or a base.
Term
neutralization
Definition
mixing an acid to a base to produce a salt and water.
Term
buffer
Definition
a solution in which pH is kept relatively constant
Term
diprotic acids
Definition
have two hydrogens in front or two ionizable protons, such as H2SO4
Term
pH
Definition
negative logarithm of the hydrogen ion concentration
Term
acid theory…hydrogen-ion donor
Definition
Bronsted-Lowry acid (medium theory)
Term
acid theory…can accept an electron pair
Definition
Lewis acid (hardest theory)
Term
acid theory…dissociates into hydrogen ions
Definition
Arrhenius acid (simplest theory)
Term
triprotic acid
Definition
have three hydrogens in front or three ionizable protons
Term
monoprotic acid
Definition
has one hydrogen in front or one ionizable proton
Term
Keeps the pH of a solution constant
Definition
buffer
Term
H+ +  OH- → H2O
Definition
summary of acid to base reaction
Term
burette
Definition
measuring instrument for titrations
Term
‘pH indicator’ examples:
Definition
phenolphthalein, pH paper, red cabbage juice, bromthymol blue, and several others.
Term
How to find the products of an acid to base being combined: Example: HZ + ROH→
Definition

one product will be water…the result of the acid’s ‘H’

and the base’s ‘OH’.

The other product is the cation of the base

and the anion of the acid….RZ.

Term

Correctly written skeleton equation for the acid to base reaction:

H2Z + R(OH)3

Definition

H2Z + R(OH)3 → H2O + R2Z3…..

Where Z could be sulfate and R could be aluminum.

Term

Correctly written skeleton equation for the acid to base reaction:

H3Z + R(OH)2

Definition

H3Z + R(OH)2 → H2O + R3Z2…..

Where Z could be phosphate and R could be magnesium.

Term

Correctly written skeleton equation for the acid to base reaction:

H1Z + R(OH)1

Definition

H1Z + R(OH)1 → H2O + R1Z1…..

Where Z could be chlorine and R could be sodium.

Term
how to find the subscripts of a compound
Definition

criss-cross the superscripts downward,

but don’t take the + or – downward.

Term
how to find the superscripts of a compound
Definition
look at the top of a periodic table and/or a polyatomic chart
Term

how to balance a skeleton equation such as:

 H3PO4 +    Mg(OH)2   →  

                    H2O  +   Mg3(PO4)2

Definition
  • Balance the Mg and (PO4) first.
  • Then count all the “H’s” on the left side of the arrow, then fix the “H’s” on the right side of the arrow.
  • Check to see if the “O’s” worked out on their own.

          2H3PO4 +    3Mg(OH)2   →  

                                       6H2O  +   1Mg3(PO4)2

Term
The coefficients of a balanced equation are also called:
Definition
moles of a balanced equation.
Term
another way to write 1x10-8M.
Definition
10-8M
Term
hydronium ion symbols are:
Definition

H3O+    or     H3O+1    or    H3O1+

[image]

Term
What does the ‘M’ of  3M HCl mean?
Definition
The ‘M’ stands for ‘molar’ which tells how concentrated or diluted the HCl is.
Term
another way to write 1x10-6M
Definition
0.000001M
Term

which number is bigger?

0.0001 or 0.001

Definition
0.001 is bigger
Term

which number is bigger?

10-4 or 10-3

Definition
0.001 which is 10-3 is bigger than 0.0001 which is 10-4
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