A 70 × 10^{- 3} M Aqueous Solution of Ca(OH)₂ at

question 61

Multiple Choice

A 7.0 × 10^{- 3} M aqueous solution of Ca(OH) ₂ at 25.0 °C has a pH of .

• A) 1.4 × 10^{- 2}
• B) 12.15
• C) 7.1 × 10^{- 13}
• D) 11.85
• E) 1.85

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Definitions:

Trypanosomes

Single-celled parasitic organisms responsible for diseases like African sleeping sickness and Chagas' disease, transmitted by insect vectors.

Foraminiferans

Single-celled protists with shells, known for their role in marine ecosystems and as indicators of environmental change.

Rhizarians

A group of mostly unicellular eukaryotic organisms that include foraminifera, radiolarians, and cercozoans, characterized by their amoeboid movement and complex shell structures.

Coccolithophorids

A group of planktonic algae that produce calcium carbonate plates known as coccoliths, contributing significantly to marine sediments.