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Ionic substances, for example, are generally soluble in water.
Some hydrophobic substances are soluble in water (ex.: proteins).
Lipid
Smaller particles are more likely to move by diffusion. Fat soluble substances are also more likely to move through diffusion also.
Many liquids dissolve in water, and many do not. In chemistry , there is a rule "like dissolves like", so if the nature of the liquid is similar to water i.e. highly polar, it will be soluble. This rule is not infallible. Butanol is very polar, but is only about 2% soluble in water.
Salts are soluble. The phospholipid bilayer membrane of cell walls are permeable to water and thus allow water and water-soluble substances, like salts, diffuse through.
Iodine is not soluble in water because iodine is nonpolar and water is polar. According to the "Like dissolve like" expression, nonpolar substances are soluble with nonpolar substances and polar substances are soluble with polar substances, but nonpolar substances are not soluble with polar substances.
the xylem transports water and the phloem transports organic substances.
water-soluble molecules such as amino acids, sugars, protiens, nucleic acids, and various ions
Ionic substances, for example, are generally soluble in water.
excess water and other water soluble substances ......
water
salt
No, it is not soluble in water. To be soluble in water means that the object can dissolve in water. Examples of soluble substances include salt, sugar and so on, while insoluble substances include oil.
Different types of powder
Some hydrophobic substances are soluble in water (ex.: proteins).
Sorry, the question in incomplete there are no suggested test substances. However; polar covalent compounds are very soluble in water.