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level: Level 1

Questions and Answers List

level questions: Level 1

Question	Answer
A solution that contains a weak acid and its conjugate base.	Buffer
The resulting product of the chemical reaction: a negatively-charged molecule Litmus reaction: Red to	red
_____ is an ion important in calculating pH of an acid solution.	Hydronium
HCl + H2O = H3O+ + Cl- ; H3O+ is a conjugate?	acid of H2O
What happens to the bicarbonate concentration of the body when one experiences hyperventilation?	Decrease
The pH scale gauges the hydronium ion concentration and reflects the degree of acidity or basicity of a solution.	True
An organic biomolecule that is composed of oxygen, carbon, sulfur, nitrogen, and hydrogen atoms.	Proteins
In the chemical reaction between HCl and water, the role of water is a proton _____.	acceptor
H2SO4 + H2O = H3O+ + HSO4- QUESTION: Provide the conjugate base in the reverse reaction.	H2O
In the hyperventilation state, what happens to the carbonic acid?	dissociates into bicarbonate and hydrogen ions
_____ is a protein which not only carries gases but also helps in maintaining the body pH.	Hemoglobin
HCl + H2O = H3O+ + Cl- Question: Which molecules are acids? Select all that applies.	HCl, H3O+
If the blood pH is 7.32, what does it tell you? Select all that applies.	The body's buffer system failed & The blood has too much hydrogen ions.
Water molecules tend to bond with the charged nonpolar molecules.	False
H2SO4 + H2O = H3O+ + HSO4- QUESTION: Provide conjugate acid in the forward reaction.	H3O+
H2SO4 + H2O = H3O+ + HSO4- QUESTION: In the forward reaction, ___ acts as a base.	H2O
HCl + H2O = H3O+ + Cl- Question: Which molecules are bases?	H2O and Cl-
H2SO4 + H2O = H3O+ + HSO4- QUESTION: Which of the following are conjugate pairs? Select all that applies.	H2O & H3O+ , H2SO4 & HSO4-
Water molecules try to rearrange around a nonpolar substance and form a cage-like structure known as _____.	clathrate
Can act not only as a proton acceptor, but also as a proton donor	Water
The protons in the internal fluids of the cell are being accepted by _____ ion, a composition of the phosphate buffer system (name).	monohydrogen phosphate
Proteins are bioorganic substances which are roughly about 10% in the living organisms.	False