Chemistry Quiz: Acids, Bases, and Reactions

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Questions and Answers

What occurs when hydrogen gas is ignited with a match?

It burns silently without any reaction.

It produces a colorless vapor.

It explodes violently.

It burns with a 'pop' sound. (correct)

What is the result of exposing a glowing splint to oxygen?

The splint re-lights. (correct)

The splint melts due to heat.

The splint burns out completely.

The splint emits a bright flash.

Which element is classified as an alkali metal?

Sodium (correct)

Helium

Chlorine

Calcium

What happens when carbon dioxide interacts with a match?

It does not ignite the match. (D) Signup and view all the answers

What indicates the presence of carbon dioxide during a reaction with limewater?

The limewater turns milky. (D) Signup and view all the answers

What is the chemical formula for Iron(III) chloride?

FeCl3 (C) Signup and view all the answers

Which of the following corresponds to Lead(IV) oxide?

PbO2 (C) Signup and view all the answers

Identify the formula for Calcium hydrogen carbonate.

Ca(HCO3)2 (B) Signup and view all the answers

What is the chemical formula for Copper(II) sulfate?

CuSO4 (A) Signup and view all the answers

Which compound is represented by the formula P2O5?

Diphosphorus pentoxide (B) Signup and view all the answers

Which property is true for acids?

Produce hydrogen gas when reacting with metals. (D) Signup and view all the answers

What is the pH range of bases?

8-14 (D) Signup and view all the answers

What is produced when an acid and a base react?

Water and salts. (A) Signup and view all the answers

Which characteristic is NOT associated with bases?

Have a pH of 0-6. (A) Signup and view all the answers

Which statement regarding acids is correct?

They have a pH of 0-6. (B) Signup and view all the answers

How many times more acidic is a solution with a pH of 6 compared to a solution with a pH of 10?

10,000 times (B) Signup and view all the answers

What is the result of a neutralization reaction between an acid and a base?

Salt and water (B) Signup and view all the answers

What happens to an atom when it gains electrons?

It forms a negative ion. (D) Signup and view all the answers

What percentage of solar energy is absorbed by Earth’s land and oceans?

51% (B) Signup and view all the answers

Which of the following species is isoelectronic with krypton (Kr)?

Arsenic (As3-) (B) Signup and view all the answers

Which components make up Earth's climate system?

Lithosphere, atmosphere, hydrosphere, biosphere (B) Signup and view all the answers

Which noble gas is isoelectronic with the fluoride ion (F⁻)?

Neon (Ne) (D) Signup and view all the answers

What program is Ontario implementing to reduce smog?

Drive Clean (C) Signup and view all the answers

What is the atomic number of arsenic (As)?

33 (C) Signup and view all the answers

Why do noble gases tend to not react with other atoms?

They have a stable electronic configuration. (A) Signup and view all the answers

What is the general form for a combination reaction?

A + B → AB (B) Signup and view all the answers

Which equation represents a decomposition reaction?

AB → A + B (C) Signup and view all the answers

What type of reaction is represented by the equation CxHy + O₂ → CO₂ + H₂O?

Combustion (D) Signup and view all the answers

In the equation 2NH₃ + H₂SO₄ → (NH₄)₂SO₄, what is the product formed?

(NH₄)₂SO₄ (A) Signup and view all the answers

What is the total mass of reactants if the masses are 24g and 73g?

97g (B) Signup and view all the answers

Study Notes

Section 5.1 - Chemical vs. Physical Changes

Chemical changes result in new substances, unlike physical changes that alter the state or form of a substance without creating new ones.
Examples of physical changes: changing states of matter
Examples of chemical changes: burning, rusting, reacting with another substance
Indicators of chemical change:
- Formation of a gas (eg., bubbles)
- Formation of a precipitate (eg., solid forming out of solution)
- Energy change (eg., heat produced or absorbed)
- Color change (eg., one substance becoming a new color)

Section 5.2 and 5.3

Elements are the simplest form of matter.
Compound is two or more elements bonded together
Hydrogen gas - Light, a "pop" occurs
Carbon dioxide gas - Light a match near the gas, no change to limewater
Oxygen gas - Glowing match, bubble of gas will extinguish
Oxygen gas - Glowing match will re-light. Limewater turns milky.
Water vapor - Cobalt paper, from blue to pink

Section 5.4

Alkali metals – sodium (Na) – IA
Alkali earth metals – calcium (Ca) – IIA
Halogens – chlorine (Cl) – VII A
Noble gases – helium (He) – VIII A

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Description

Test your knowledge on chemical reactions involving acids, bases, and various compounds. This quiz covers important concepts like pH levels, neutralization reactions, and the formulas of key substances. Get ready to demonstrate your understanding of basic chemistry principles.