HESI A2 CHEMISTRY: CHEMICAL EQUATIONS REACTION

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HESI A2 CHEMISTRY: CHEMICAL EQUATIONS & REACTION

RATES, EQUILIBRIUM, & REVERSIBILITY; SOLUTIONS &

SOLUTION CONCENTRATIONS EXAM QUESTIONS

Qs and Ans Expert- Explanation

This Exam contains:

-Guarantee passing score -18 Questions and Answers -format set of multiple-choice -Expert- Explanation

Question 1: Emulsions

Answer:

Mixtures of matter that readily separate such as water and oil

Question 2: 4 ways to increase reaction rate

Answer:

Increase the temp. in the reaction, increase the surface area of the reactants, add a catalyst, or increase the concentrations of reactants.

Question 3: Solute

Answer:

Part or parts that are being dissolved

Question 4: Solution

Answer:

Homogenous mixture of 2 or more substances

Question 5: Increasing temp

Answer:

Particles have greater kinetic energy, causing them to move around faster

Question 6: Solvent

Answer:

Part that is doing the dissolving

Question 7: Alloys

Answer:

Solid solutions of metals to make a new one such as bronze, which is copper and tin, or steel, which is iron and carbon, and may contain, tungsten, chromium, and maganese.

Question 8: Catalysts

Answer:

Accelerates a reaction by reducing the activation energy or the amount of energy necessary for a reaction to occur

Question 9: Mole

Answer:

6.02 x 10^23 (Avagadro's number)

Question 10: Amalgams

Answer:

A specific type of alloy in which a metal is dissolved in mercury

Question 11: Percent concentration

Answer:

Expression of concentrations as parts per 100 parts

Question 12: Equilibrium

Answer:

State in which reactants are forming products at the same rate that the products are forming reactants

Question 13: Compound

Answer:

When elements exist in combination with another element

Question 14: Increasing concentration

Answer:

Cause more chance collisions between the reactants and produce more products

Question 15: Molar Concentrations

Answer:

Written as mol/L

Question 16: Chemical equations

Answer:

Simple recipes; Ingredients called reactants, react to produce desired end results or compounds, called products.

Question 17: Increasing surface area

Answer:

Gives particles more opportunity to come into contact with each other

Question 18: Compounds

Answer:

Mixtures of different elements to create a single matter