What Is the Hydronium-Ion Concentration in a 0

question 138

Multiple Choice

What is the hydronium-ion concentration in a 0.018 M solution of carbonic acid,H₂CO₃? For carbonic acid,Ka₁ = 4.2 × 10^-7 and Ka₂ = 4.8 × 10^-11.

• A)1.8 × 10^-2 M
• B)4.2 × 10^-7 M
• C)4.8 × 10^-11 M
• D)8.7 × 10^-5 M
• E)4.3 × 10^-5 M

---

Definitions:

Taxable Income

The amount of income that is used to calculate an individual's or a company's income tax due. It is the gross income minus deductions and exemptions allowed by the tax code.

Adjusted Gross Income (AGI)

The total gross income minus specific deductions defined by the IRS, used to determine taxable income.

Qualifying Relative

A term used in tax law to describe someone who doesn’t have to live with the taxpayer all year but must meet certain financial support and income criteria to be claimed as a dependent.

Gross Income Test

A requirement for determining if someone can be claimed as a dependent, based on their income level.