What Is the PH of a Solution Prepared by Mixing

question 141

Multiple Choice

What is the pH of a solution prepared by mixing 50.00 mL of 0.10 M NH₃ with 5.00 mL of 0.10 M NH₄Cl? Assume that the volume of the solutions are additive and that K_b = 1.8 × 10^-5 for NH₃.

• A) 8.25
• B) 9.28
• C) 10.26
• D) 11.13

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Definitions:

Human Genome Project

an international scientific research project with the goal of determining the sequence of nucleotide base pairs that make up human DNA, and of identifying and mapping all of the genes of the human genome.

Repeated Sequences

DNA segments that are present multiple times within a genome, including both tandem repeats and interspersed repeats.

Nucleotides

Organic molecules that serve as the monomers, or subunits, of nucleic acids like DNA and RNA, consisting of a nitrogenous base, a sugar, and one or more phosphate groups.

Microinjection

A technique used in molecular biology to deliver substances directly into cells by penetrating the cell membrane with a fine needle.