#Question id: 394
#Unit 1. Molecules and their Interaction Relevant to Biology
What will be the H+ ion concentration in a solution prepared by mixing 50.0 mL of 0.20 M NaCl, 25 mL of 0.10M NaOH and 25.0 mL of 0.30M HCl?
#Question id: 392
#Unit 1. Molecules and their Interaction Relevant to Biology
When an ionic compound such as sodium chloride (NaCl) is placed in water, the component atoms of the NaCl crystal dissociate into individual sodium ions (Na+) and chloride ions (Cl-). In contrast, the atoms of covalently bonded molecules (e.g., glucose, sucrose, glycerol) do not generally dissociate when placed in aqueous solution. Which of the following solutions would be expected to contain the greatest number of solute particles (molecules or ions)?
#Question id: 388
#Unit 1. Molecules and their Interaction Relevant to Biology
Calculate the pH of a solution prepared by mixing 2.0 mL of a strong acid solution of pH=3.0 and 3.0 mL of a strong base of pH=10.0.
#Question id: 386
#Unit 1. Molecules and their Interaction Relevant to Biology
Which of the following properties of water does not contribute to the fitness of the aqueous environment for living organisms?
#Question id: 385
#Unit 1. Molecules and their Interaction Relevant to Biology
In which reaction below does water not participate as a reactant (rather than as a product)?
#Question id: 373
#Unit 1. Molecules and their Interaction Relevant to Biology
What is the hydroxyl ion (OH-) concentration of a solution of pH 8?