What Happens to the PH of a 1M Solution of Hydrochloric

question 120

Multiple Choice

What happens to the pH of a 1M solution of hydrochloric acid, HCl, as carbon dioxide gas is bubbled into it?

• A)The pH decreases as the solution becomes more acidic since carbon dioxide reacts to form carbonic acid thus increasing the overall acid concentration.
• B)The pH increases as the solution becomes more basic since the carbon dioxide continues to tie up more and more of the hydrogen ions as associated carbonic acid molecules.
• C)The pH remains unchanged. Carbon dioxide is unable to affect the pH in the presence of such a concentrated solution of such a strong acid.
• D)At first the pH will increase as carbon dioxide ties up the hydrogen ions from the solution. Once the concentration of the resulting carbonic acid becomes greater than 1M, the pH will begin to decrease indicating the presence of more acid.

Distinguish between various geological processes leading to the formation of basins and mountains.

Explain the role of erosion in shaping mountain belts and exposing deep rocks on the surface.

Recognize the impact of volcanic activity on local mountain creation and identify types of volcanoes.

Assess how crustal thickness variations contribute to the formation and elevation of mountainous regions.

---

Definitions:

AE Curve

The AE curve represents the Aggregate Expenditure in an economy at various levels of income or output, showing the total spending (consumption, investment, government spending, and net exports) at those levels.

Deadweight Loss

A reduction in economic productivity occurring when there is no achievement of equilibrium for a good or service.

Marginal Revenue

The enhanced income derived from peddling an additional unit of a product or service.

Marginal Cost

The increase in total cost that arises from producing one additional unit of a good or service, a critical factor in economic decision-making.