0
Explain why soaps can be effective in hard water if relatively large quantities of soap are added to water?
Wiki User
∙ 10y ago
A soap is an organic molecule that has a polar/hydrophilic end and a nonpolar/hydrophobic end. The polar end typically has a hydroxyl functional group, which acts like a weak acid in water.
Hard water is water that has a relatively large solute load, typically calcium, magnesium and other metals.
When you add a soap to hard water, the metal ions in the water attach themselves to the polar end and you get a precipitate of the salt form of the soap. This inactivates the soap. However, if you add enough soap, you will effectively "soften" the water by pulling enough metal ions out of solution to still have active soap molecules in the water.
Wiki User
∙ 10y ago
Add your answer:
Earn +20 pts
What kind of quantities can always be added or subtracted from both sides of an equation?
Equal quantities.
Can scalar quantities be added together?
Yes, scalar quantities can be added, as long as they are the same dimension and you keep units straight. For example you cannot add cubic meters to square meters. But (especially in the imperial system) pounds and ounces, or feet and inches are added, and displayed in that fashion. Minutes and seconds is another.
What quantities can always be added or subtracted from both sides of an equation?
Identical quantities can be added (or subtracted) from each side. Each side can also be multiplied (or divided) by any quantity.
Must quantities have different units before they can be added or subtracted?
no
Why can quantities with different units never be added or subtracted bwhy can quantities with different units never be added or subtracted but can be multiplied or diviut can be multiplied or divided?
Only like terms can be added or subtracted. 10m and 1s cannot be added; but divided, 10 m/s becomes a velocity.
Which quantities can always be added or subtracted from both sides of an equation?
Equal
What can be added to both sides of a linear equation?
Equal quantities may be added to both sides of a linear equation.
Why are enzymes mixed with vinegar less effective?
Enzymes are sensitive to changes in pH and only work with a relatively small pH range. Since vinegar is an acid, the pH of the solution containing the enzymes is changes when vinegar is added.
Small quantities of material added to semiconductor to increase electrical conduction?
are called dopants
What quantities can always be added or subtracted from both sides of an equationacted from both sides of an equation?
Quantities that are equal can be added or subtracted from both sides of an equasion. For example: x + 2 = 36 subtract both sides by 2 x = 34
Can Scalar and vector quantities be added by the same method?
No, scalar can be added together directly, whereas vectors can only add their separate components together.
What is the difference between partial molal quantities and partial molar quantities?
During the determination of the partial molal quantities the weight of the solution to which a substance is added is taken into consideration while in case of the partial molar quantity the volume is taken into consideration.
