Chem Test #2

Question 1

Naming compounds

Answer 1

Ionic: 1 metal & 1 nonmetal

Molecular: 2 nonmetals

Question 2

Creating chemical formulas

Answer 2

Name —> formula

e.g: Barium Phosphate → Ba3(PO4)2

Question 3

Word, skeletal, & balanced equations

Answer 3

Word: names of the elements

Skeletal: signs of the elements with charges

Balanced: signs of the elements with charges, add coefficients if needed to balance both sides of charges

Question 4

Determining the type of chemical reaction

Answer 4

Synthesis: smaller atoms/molecules into larger molecules (A+B —> AB)

Decomposition: splitting a large molecule into smaller ones (AB —> A + B)

Single Displacement: element replaces another element from a compound (C + AB —> CB + A)

Double Displacement: elements in diff compounds exchange places (AB+CD—>CB+AB)

Question 5

Acids & bases properties

Answer 5

Acids: sour, not slippery, corrode metals

Bases: bitter, slippery, do not corrode metals

Question 6

Indicators

Answer 6

Indicators: Acid Base
Red litmus paper: Red Blue
Blue litmus paper: Red Blue
Phenolphthalein: Clear Pink
Bromothymol blue: Yellow Blue

Question 7

Neutralization reactions

Answer 7

Acid + Base —> Salt + Water

Formula: HA + BOH —> AB + H2O

e.g: H2SO4 + KOH —> K2SO4 + H2O

Question 8

Application of neutralization reactions in the real world

Answer 8

-medicine: tums

-agriculture: making soil more or less acidic

-pools & hot tubs

Question 9

Naming acids & bases

Answer 9

1) Hx (x is a halogen)
Steps: add prefix “hydro”, then halogen name (with ic ending) then add the word acid. e.g: HCl - hydrochloric acid

1) Hx (x is a polyatomic)
Steps: use the start of the polyatomic name, add “ic” to the end, then add acid. e.g: HNO3 - nitric acid

Question 10

Types of combustion reactions

Answer 10

Complete: products are CO2 & H2O

Incomplete: products are H2O, CO2, CO, & C

Question 11

Single displacement & double displacement reactions

Answer 11

To solve these reactions, you need to swap alike elements (metal can swap with metal, metal cannot swap with nonmetal) then balance out the equations.

Question 12

pH scale

Answer 12

A scale on which the strength of an acid or base is measured on

Question 13

Neutralization

Answer 13

Reactions between an acid & a base

Question 14

Why shouldn’t combustion reactions occur in enclosed environments?

Answer 14

Toxic gases are released (C & CO)