Chemical? Perhaps because it is changing?
Matte because it is harder to take off
Hard water contains salts of calcium and magnesium principally as bicarbonates, chlorides, and sulfates. Ferrous ion may also be present;
<u>Explanation</u>:
- Hard water contains salts of calcium and magnesium principally as bicarbonates, chlorides, and sulfates. Ferrous ion may also be present; oxidized to the ferric form. It appears as a reddish brown stain on washed fabrics and enameled surfaces.
- Water hardness that is caused by calcium bicarbonates is known as temporary, because boiling converts the bicarbonates to the insoluble carbonates; hardness from other salts is called permanent.
- Calcium and magnesium ions in hard water react with the higher fatty acids off soap to form an insoluble gelatinous curd, thereby causing a waste of the soap.
Answer:
They have a hydrophilic and hydrophobic end
Explanation:
The structure of detergents enables them to perform their functions as a cleansing agent for removing stains. Detergents are more preferable to soap for cleaning because they are indifferent to water hardness and can retain their cleansing properties in any medium.
A typical detergent has a hydrophilic head (-SO₃⁻Na⁺) and a hydrophobic tail, a long chain hydrocarbon from C₁₂ to C₁₈ or a benzene ring having a long chain hydrocarbon as its substituent.
This structure enables the hydrophilic head to bind with water and makes the detergent soluble. The other head head attaches to the fabric, in this case the feather.
The property that makes detergents able to remove stains lies in the structural arrangement of their component elements.
