Quiz on Homogeneous Mixtures

Use the image below to help you choose the best answer for questions 4 through 6. Determine: Which models show a homogeneous mixture? TEKS 8.6A

• 6

• 1, 3, 4, and 5

• 1 and 4

• 5 and 6

Four students categorize the following four foods as elements, compounds, homogeneous mixtures, and heterogeneous mixtures. Which student is correct?

• Camila

• Mateo

• Olivia

• Liam

Using the periodic table, what atoms are present in the following chemical reaction? TEKS 8.6B CO₂ + NaOH → NaHCO₃

• nitrogen, hydrogen, oxygen, carbon

• sodium, oxygen, hydrogen, cobalt

• nitrogen, hydrogen, oxygen, cobalt

• sodium, oxygen, hydrogen, carbon

Tags

NGSS.MS-PS1-1

What atoms are involved in this chemical reaction? TEKS 8.6B CaCO₃ → CaO + CO₂

• calcium, cobalt, and oxygen

• calcium, carbon, and oxygen

• carbon and oxygen

• calcium, carbon, and cobalt

Tags

NGSS.MS-PS1-1

In the chemical equation HCl (acid) + NaOH (base) → H₂O + NaCl, what atoms are present and what is produced by the reaction? TEKS 8.3A, 8.6B, 8.6D

• Atoms of hydrogen, chlorine, sodium, and oxygen are present. When HCl and NaOH are combined they produce water and salt. This is because they neutralize the properties of each other.

• Atoms of hydrogen, chlorine, nitrogen, and oxygen are present. When HCl and NaOH are combined they produce water and salt. This is because they neutralize the properties of each other.

• Atoms of hydrogen, chlorine, sodium, and oxygen are present. When HCl and NaOH are combined they produce water and salt. This is because the properties of the acid take over.

• Atoms of hydrogen, chlorine, sodium, and oxygen are present. When HCl and NaOH are combined they produce water and salt. This is because the properties of the base take over.

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-2

Examine the image. Analyze: Which process is depicted in the image of an insect on water, such as the insect on water? TEKS 8.6C

• capillary action

• adhesion

• cohesion

• surface tension

What is the correct matching of property of water and observable phenomena in the table? TEKS 8.6C

• Cohesion pairs with insects walking on water, adhesion pairs with transport in plants, and surface tension pairs with formation of droplets.

• Cohesion pairs with formation of droplets, adhesion pairs with insects walking on water, and surface tension pairs with transport in plants.

• Cohesion pairs with transport in plants, adhesion pairs with insects walking on water, and surface tension pairs with formation of droplets.

• Cohesion pairs with formation of droplets, adhesion pairs with transport in plants, and surface tension pairs with insects walking on water.

Examine the pH scale. Evaluate: What type of solution is one that has a pH of 9? TEKS 8.6D

• acid

• base

• neutral

• acidic and basic

A pool was tested using a pH testing strip. The key and results are shown below. What is the current pH value of the pool and what does this tell us? TEKS 8.1E, 8.3A, 8.6D

• The pH level of the pool is at a 3. This means that the pool is currently acidic and needs to be balanced before it is safe to go in.

• The pH level of the pool is at a 3. This means that the pool is currently basic and needs to be balanced before it is safe to go in.

• The pH level of the pool is at a 3. This means that the pool is currently neutral and is perfectly safe to go in as it is neither acidic nor basic.

• The pH level of the pool is at a 5. This means that the pool is currently acidic and needs to be balanced before it is safe to go in.

Two solutions are mixed and react to produce AgCl. The chemical reaction is shown by the balanced equation: AgNO₃ + LiCl → AgCl + LiNO₃ What happens to the total mass as the reaction takes place? TEKS 8.3A, 8.6E

• The mass increases.

• The mass decreases.

• The mass remains constant.

• The mass first increases and then decreases.

Tags

NGSS.MS-PS1-5