HESI A2 CHEMISTRY - OXIDATION-REDUCTION REACTIONS

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HESI A2 CHEMISTRY - OXIDATION-REDUCTION REACTIONS

& ACIDS AND BASES EXAM QUESTIONS Actual Qs and Ans Expert-Verified Explanation

This Exam contains:

-Guarantee passing score -24 Questions and Answers -format set of multiple-choice -Expert-Verified Explanation

Question 1: Superbase

Answer:

Extremely strong compared to sodium hydroxide & cannot be kept in an aqueous solution organized into organic, organometallic, & inorganic classes

Question 2: Oxidation numbers

Answer:

roman numbers in parentheses that are used as part of the naming scheme for inorganic compounds

Question 3: Uses of bases

Answer:

as insoluble catalysts in heterogenous reactions catalysts in hydrogenation

Question 4: Common bases

Answer:

drain cleaner, soap, baking soda, ammonia, egg whites, & sea water

Question 5: neutral compound

Answer:

sum of all atoms or ions must equal to 0

Question 6: Potential of Hydrogen (pH)

Answer:

a measurement of the concentration of hydrogen ions in a substance in terms of the number of moles of H? per liter of solution

Question 7: Common acids

Answer:

urine, stomach acid, citric acid, vinegar, hydrochloric acid, battery acid

Question 8: Strong acid

Answer:

include hydrochloric, hydriodic, hydrobromic, perchloric, nitric, sulfuric

Question 9: Properties of Bases

Answer:

conduct electricity change red litmus paper blue feel slippery react with acids to neutralize their properties

Question 10: monatomic ion

Answer:

oxidation state is equal to its charge

Question 11: Elemental form

Answer:

only 1 kind of atom is present & its charge is 0

Question 12: Weak base

Answer:

one that doesnt completely ionize in an aqueous solution, & usually has a low pH

Question 13: Properties of Acids

Answer:

can conduct electricity change blue litmus paper to red sour taste react with bases to neutralize them react with active metals to free hydrogen

Question 14: Acid uses

Answer:

pickling - rust removal catalysts food preservatives or taste

Question 15: Oxidation state

Answer:

the hypothetical charge on an atom if all of its bonds are 100 percent ionic they are integers that can occasionally be fractional numbers is increased through oxidation (loss of electrons) and decreased through reduction (gain of electrons)

Question 16: Reducing agent

Answer:

species that loses electrons is oxidixed

Question 17: Oxidation/reduction (Redox) reactions

Answer:

the transfer of 1 or > electrons, or they can occur as a result of the transfer of oxygen, hydrogen, or halogen atoms

Question 18: Strong bases

Answer:

can free protons in very weak acids hydroxide compounds - barium, potassium, lithium hydroxides

Question 19: Superacids

Answer:

those that are stronger than 100 % sulfuric acid fluoroantimonic, magic, perchloric acids

Question 20: Oxidizing agent

Answer:

species that gains electrons is reduced

Question 21: Single replacement reactions

Answer:

types of oxidation/reduction reactions electrons are transferred from 1 chemical species to another this changes the nature & charge of the species

Question 22: polyatomic ion

Answer:

charge is equal to sum of all oxidation state numbers

Question 23: Halochromic

Answer:

changes color to indicate that hydrogen or hydronium ions have been detected

Question 24: Weak acid

Answer:

one that does not donate all of its protons or disassociate completely