What best describes what happens when an acid such as HCl is mixed with water?
A) The proton chemically bonded to the chlorine is transferred to a water molecule and forms a chloride ion and a hydronium ion.
B) A proton from the chlorine nucleus is ejected and captured by a water molecule to form a negatively charged HCl and a new hydronium ion.
C) A hydroxide ion from the water is transferred to the HCl molecule to form a proton and hydronium ion.
D) HCl is not an acid.
E) none of the above
Question 2
Are the chemical reactions that take place in a disposable battery exothermic or endothermic? Is the reaction going on in a rechargeable battery while it is recharging exothermic or endothermic?
A) An operating disposable battery is driven by endothermic reaction, while a recharging rechargeable battery is also driven by endothermic reactions.
B) An operating disposable battery is driven by exothermic reaction, while a recharging rechargeable battery is driven by endothermic reactions.
C) An operating disposable battery is driven by endothermic reaction, while a recharging rechargeable battery is driven by exothermic reactions.
D) An operating disposable battery is driven by exothermic reaction, while a recharging rechargeable battery is also driven by exothermic reactions.
Overview of the citric acid cycle
Air pressure under water
Proton Pump Inhibitors
Water Solubility of Selected Chemicals
pH Scale - Weak Acid and their conjugate Base
Specific amino acid–nucleotide contacts for cI and Cro repressors