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Balancing Equations
Chemical equilibrium, 9th - 12th , classifying reactions, 10th - 11th , haber process, energy level diagrams, chemical reactions, 11th - 12th , reaction quotient, q and equilibrium con....
Chemical Reaction Unit Test
Chemistry, science.
22 questions
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Identify all factors to help a chemist recognize that a chemical reaction had occurred. There may be more than 1 answer to this question.
Change in temperature
Solid dissolves in solution
Combustion occurred
Change in color
Formation of bubbles
Write the following reaction in a chemical equation:
A gas stove is lit due to a reaction between methane (CH 4 ) and oxygen (O 2 ). The reaction releases carbon dioxide (CO 2 ) and water (H 2 O).
The chemical reaction in an alkaline battery can be represented by the following chemical equation:
Zn + 2MnO 2 + H 2 O ---> ZnO + 2MnOOH
What are the reactant(s) for this experiment?
- 4. Multiple Choice Edit 2 minutes 1 pt An element plus additional element reacts to form one product is an example of which type of chemical reaction? combustion decomposition synthesis single replacement
- 5. Multiple Choice Edit 2 minutes 1 pt A compound is reacted and forms two new substances. What type of reaction is this? combustion synthesis decomposition single replacement
Increasing the temperature of a chemical solution will.......
increase the kinetic energy of the molecules in the solution
decrease the kinetic energy of the molecules in the solution
not change the kinetic energy of the molecules in the solution
If the reactant particles collide with more than the activation energy, the particles will be react, and new chemical bonds will be formed.
What are the product(s) for this experiment?
The chemical reaction to synthesize ammonia from nitrogen and hydrogen can be represented as below. However, the equation is not balanced. Balance the equation by answering the questions below:
N 2 + H 2 ---> NH 3
a. How many N2 molecules is required for this reaction?
b. How many H2 molecules is required for this reaction?
c. How many NH3 compounds will be produced?
Your answer should be clearly stated in three parts.
An acid has a pH
higher than 7
lower than 7
greater than 14
if you add an acid to a base what will happen?
combustion will occur
it will neutralize
it wont mix
the acid and base will be diluted
- 12. Multiple Choice Edit 2 minutes 1 pt Human blood has a pH between 7.35 and 7.45. Which of the following best describes human blood? strongly acidic slightly acidic strongly basic slightly basic
- 13. Multiple Choice Edit 2 minutes 1 pt Identify the salt in the following equation: Zn(OH) 2 + HNO 3 ---> H 2 O + Zn(NO 3 ) 2 Zn(OH) 2 HNO 3 H 2 O Zn(NO 3 ) 2
Scale that measures how acidic or basic something is.
The table shows the pH of several solutions. Which solution has the greatest concentration (amount) of H + ions?
What term is given to a reaction which transfers heat energy to the surroundings?
Endothermic
if more heat energy is released in making bonds in the products than is taken in when breaking bonds in the reactants
Is this diagram endothermic or exothermic
What type of chemical reaction absorbs energy and requires energy for the reaction to occur?
What is collision theory?
Molecules must collide in the correct orientation with enough energy to bond.
Molecules need enough energy to collide and react.
Atoms constantly collide and react.
The minimum energy needed for atoms to react
Which has more surface area?
Large chunks of chalk
Cube of sugar
Powdered sugar
Small chunks of sugar
- 22. Multiple Choice Edit 2 minutes 1 pt More collisions correspond to a: Faster reaction rate Slower reaction rate Constant reaction rate None of the above
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COMMENTS
Chemistry: Unit 5: 5.09 Types of Reactions Indicate whether the reaction is an example of a synthesis, decomposition, combustion, single displacement or double displacement reaction.
Which generalized equation best represents a combustion reaction? fuel + energy→oxygen. A +B→AB. A + oxygen→energy. AB→A + B. A + oxygen→energy. remember that its always reactant + oxygen -> product (s) + heat. Study with Quizlet and memorize flashcards containing terms like Which equation represents a combustion reaction? 4Fe + 3O2 ...
Check all of the reactions that occurred. combustion. decomposition. double replacement. synthesis. decomposition. double replacement. Silver tarnishes as silver metal reacts with hydrogen sulfide, H2S, in the air. In this reaction, dark silver sulfide, Au2S, covers the surface of silver.
What type of chemical reaction absorbs energy and requires energy for the reaction to occur? Molecules must collide in the correct orientation with enough energy to bond.
Chemical reactions can be classified by type. Combination reactions (also called composition reactions) make a substance from other substances. Decomposition reactions break one substance down into multiple substances. Combustion reactions combine molecular oxygen with the atoms of another reactant.
Decomposition— break down. Single Replacement— one replaces another. Double Replacement— two switch. Combustion— burn. 6. The four sets of chemical reactions shown in Model 1 have the following general names. Discuss within your group which name belongs to which set of chemical reactions.
5.09 Unit Test: Chemical Reactions - REQ. Methane burns in oxygen to yield carbon dioxide and water. The chemical formula for this reaction is CH4 + 2O2--> CO2 + 2H2O. What is the product, or what are the products, of this reaction? Click the card to flip 👆. carbon dioxide and water.
Although there are untold millions of possible chemical reactions, most can be classified into a small number of general reaction types. Classifying reactions has two purposes: it helps us to …
Review the concepts of chemical equilibrium, reaction rates, and Le Chatelier's principle with these interactive flashcards. Test your knowledge and prepare for your chemistry exam.
A reaction in which one element or radical takes the place of another element or radical in a compound. A chemical reaction that results in a large amount of energy being released when a carbon compound combines with oxygen. A number used to represent the number of electrons lost, gained or shared in a chemical change.
Study with Quizlet and memorize flashcards containing terms like Chemical Reaction, Evidence of a chemical reaction, Entropy and more.