Question

BA 25.3 An Introduction to Chemical Reactions Page 9 of 12 PRELAB QUESTIONS Read the Background and Words You Should Know section carefully, and then, on a separate, sheet or sheets of paper define, in your own words, the following terms: a. chemical reaction b. chemical change c. physical change d. change of state e. reactant f. product 5. aqueous h. solvent i. formula unit J. exothermic k endothermic I exergonic m. endergonic 2. Write the chemical formulas for the following: b aluminum a. copper c. hydrochloric acid e. copper(II) chloride 5 sodium hydroxide d. magnesium sulfate f. sodium bicarbonate - h. methane j. sodium chloride I oxygen i. hydrogen k carbon dioxide m. calcium carbonate 0. aluminum chloride n. magnesium hydroxide p. sodium carbonate q. calcium chloride T. water S. sodium t carbon monoxide v. iron u sulfur w.iron (II) sulfide X. magnesium chloride y. sulfuric acid 2. sodium sulfate bad Bri HBr aq 3. Name the following compounds: Cu(NO). Cuco KClaq KBraq CL KOH aq NaNO. AgCI

Answer 1

Chemical reaction: Chemical reactions are the processes by which chemicals interact to form new chemicals with different compositions. Simply stated, a chemical reaction is the process where reactants are transformed into products.

Chemical change: A chemical change occurs when the substance's composition is changed. When bonds are broken and new ones are formed a chemical change occurs.

Physical change: Physical changes are limited to changes that result in a difference in display without changing the composition.

Change of state: The change of state is likewise a physical change. In this scenario, one can observe a number of physical properties changing, such as viscosity and shape. As ice turns into water, it does not retain a solid shape and now becomes a viscous fluid.

Reactant and Products: Reactants are the starting materials in a chemical reaction. Reactants undergo a chemical change in which chemical bonds are broken and new ones formed to make products.

Aqueous - Solution having water as solvent is aqueous.

Solvent, solute and solution - The larger portion of solution is solvent and lesser portion is solute. Solute gets dissolved in solvent to make solution.

Formula unit - representation of Definite composition of elements forming a compound such as H2O.

Exothermic and Endothermic - Releasing heat is exothermic and absorbing heat is endothermic.

Exergonic and Endergonic - exergonic is heat released to surroundings and endergonic is heat absorbed from surroundings.

Formulas,

A) Cu

B) Al

C) HCl

D) MgSO4

E) CuCl2

F) NaHCO3

G) NaOH

H) CH4

I) H2

J) NaCl

K) CO2

L) O2

M) CaCO3

N) Mg(OH)2

O) AlCl3

P) Na2CO3

Q) CaCl2

R) H2O

S) Na

T) CO

U) S

V) Fe

W) FeSO4

X) MgCl2

Y) H2SO4

Z) Na2SO4

Names

- Copper Nitrate

- Bromine

- Copper carbonate

- Hydrogen Bromide

- Potassium Chloride

- Potassium Hydroxide

- Potassium Bromide

- Sodium Nitrate

- Chlorine

- Silver chloride