Is CH4 a Strong Acid, a Weak Acid, or a Species with Negligible Acidity? Write the Formula of Its Conjugate Base and Indicate Whether the Conjugate Base is a Strong Base, a Weak Base, or a Species with Negligible Basicity.

CH4, or methane, is considered to be a species with negligible acidity. This is because it does not readily donate protons (H⁺ ions) in solution, which is a defining characteristic of acids. The acidity of a compound can often be reflected in its ability to lose a proton, and methane is extremely stable due to its C-H bonds.

The conjugate base of methane is the methyl anion (CH₃⁻). When methane donates a proton, it forms this anion. In terms of basicity, the methyl anion is considered a strong base because it has a high tendency to accept a proton, making it very reactive in gaining protons to form neutral methane again.

To summarize, CH4 is a species with negligible acidity, and its conjugate base, CH₃⁻, is a strong base due to its high reactivity in seeking protons.