Question

Osmosis Worksheet...

Answer 1

1. ᴛʜɪs ɪs ᴛʜᴇ ᴘᴀʀᴛɪᴀʟʟʏ ᴘᴇʀᴍᴇᴀʙʟᴇ ᴍᴇᴍʙʀᴀɴᴇ.

2.ᴀ ᴍᴇᴍʙʀᴀɴᴇ ᴛʜᴀᴛ ɪs ᴘᴇʀᴍᴇᴀʙʟᴇ ᴛᴏ ᴛʜᴇ sᴍᴀʟʟ ᴍᴏʟᴇᴄᴜʟᴇs ᴏғ ᴡᴀᴛᴇʀ ᴀɴᴅ ᴄᴇʀᴛᴀɪɴ sᴏʟᴜᴛᴇs ʙᴜᴛ ᴅᴏᴇs ɴᴏᴛ ᴀʟʟᴏᴡ ᴛʜᴇ ᴘᴀssᴀɢᴇ ᴏғ ʟᴀʀɢᴇ sᴏʟᴜᴛᴇ ᴍᴏʟᴇᴄᴜʟᴇs.

ɪᴛ ɪs ᴀ ᴘᴀʀᴛɪᴀʟʟʏ ᴘᴇʀᴍᴇᴀʙʟᴇ ᴍᴇᴍʙʀᴀɴᴇ.

3. ᴀ. 28 sᴍᴀʟʟ ᴍᴏʟᴇᴄᴜʟᴇs ᴀʀᴇ ᴛʜᴇʀᴇ ᴏɴ ʟᴇғᴛ ʜᴀɴᴅ sɪᴅᴇ.

ʙ. 15 sᴍᴀʟʟ ᴍᴏʟᴇᴄᴜʟᴇs ᴀʀᴇ ᴛʜᴇʀᴇ ᴏɴ ʀɪɢʜᴛ sɪᴅᴇ.

4. ᴄᴏɴᴄᴇɴᴛʀᴀᴛɪᴏɴ ᴏғ sᴍᴀʟʟᴇʀ ᴍᴏʟᴇᴄᴜʟᴇs ɪs ʜɪɢʜᴇʀ ɪɴ ʟᴇғᴛ ʜᴀɴᴅ sɪᴅᴇ.

5. ʙᴇᴄᴀᴜsᴇ, ᴛʜᴇ ʜᴏʟᴇs ᴛʜʀᴏᴜɢʜ ᴡʜɪᴄʜ ᴘᴀʀᴛɪᴄʟᴇs sʜᴏᴜʟᴅ ᴘᴀss ᴀʀᴇ ᴛᴏᴏ sᴍᴀʟʟ ᴛʜᴀᴛ ʟᴀʀɢᴇʀ ᴘᴀʀᴛɪᴄʟᴇs ᴄᴏᴜʟᴅ ɴᴏᴛ ᴘᴀss ᴛʜʀᴏᴜɢʜ ɪᴛ.

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Answer 2

1. in the diagram .
2. A membrane that is permeable to the small molecules of water and certain solutes but does not allow the passage of large solute molecules. This term is preferred to semipermeable membrane when describing membranes in living organisms.
3. (i) 15 small molecules are presenton the left side. (ii) 28 small molecules are present on the right side.
4. On the right side.
5. The membrane is selectively permeable because substances do not cross it indiscriminately. Some molecules, such as hydrocarbons and oxygen can cross the membrane. Many large molecules (such as glucose and other sugars) cannot.
6. In the second picture.
7. Because there is more conc.entration of smaller mol.ecules on the right side i.e. there is high pres.sure and mol.ecules flow from high pres.sure to low pre.ssure .
8. "N.et movement" is a way of des.cribing the "final" or "total" am.ount of mo.vement taking place, although neither of these ter.ms are su.fficient to tru.ly des.cribe things in the sa.me way the term "n.et" does.
9. "Diffusion" is the gradual move.ment/disp.ersion of conce.ntration within a body, due to a conc.entration gradi.ent, with no net mov.ement of matter. An exa.mple of a process where both bu.lk motion and diffu.sion occur is hum.an bre.athing.

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