Calculate the Minimum Concentration of Cr³⁺ That Must Be Added

question 10

Multiple Choice

Calculate the minimum concentration of Cr³⁺ that must be added to 0.095 M NaF in order to initiate a precipitate of chromium(III) fluoride.(For CrF₃ , K_sp = 6.6 × 10^-11.)

• A)0.023 M
• B)0.032 M
• C)7.7 × 10^-8 M
• D)2.9 × 10^-9 M
• E)6.9 × 10^-10 M

---

Definitions:

Impulse Control

Impulse control is the ability to resist or delay an immediate reaction or temptation, in order to achieve a more beneficial outcome.

Reality Testing

A psychoanalytic therapy and mental health technique involving the practice of assessing whether thoughts or perceptions correspond to reality.

Self-actualization

Accomplishing the full extent of one’s skills and potential, viewed as a universal impulse or demand within each individual.

Impulse Control

The ability to resist or delay an impulse, desire, or temptation to act.