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Page 6 Dissolving Salt in Water
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org.concord.modeler.text.LineIcon600.01203006015<html><center><br><br><font size="8">Dissolving Salts in Water</font><br>Page 6 of 7</center></html>-333334
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<font size="4">When making solutions in a chemistry lab many times an ionic
or polar covalent solid is dissolved in water. As the solution process occurs,
water moves carrying particles of different sizes in solution. Dissolved
particles are always moving about randomly in the water; the movement of
those particles occurs from a region of high concentration to a region of
low concentration until equlibrium is reached. At this point there is
still particle movement, however the concentration is uniform.</font>
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18. The purple and green spheres represent the ions that make up a sodium
chloride crystal. This crystal has been placed in water. Play the
simulation and answer the following questions. As the sodium and chloride
ions separate as the crystal dissolves, they will occur as...
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Na+ and Cl+
Na+ and Cl-
Na- and Cl-
Na- and Cl+
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19. Water molecules are polar covalent. This means...
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when water is analyzed in Antarctica it is covalent.
hydrogen and oxygen in the moleucle have an equal attraction for the bonding electrons.
H has a greater attraction for the bonding e- making it slightly - and O slightly + in the molecule.
O has a greater affinity for the bonding e- making it slightly - and H slightly + in the molecule.
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20. Heat up the system until the ions have separated and then cool the
system down and stop the simulation. Describe the interaction between the
water molecules and the ions. Be specific in identifying the atoms of the
water molecules and the ions involved and their orientation in relation to
each other.
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21. Click on "Show Charge" and add to your description.
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22. Based on Questions #20 and #21, identify which of the following
statements is correct:
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Green represents Cl ions which are attracted to O, purple are Na ions which are attracted to H.
Purple represents Cl ions which are attracted to O, green are Na ions which are attracted to H.
Green represents Cl ions which are attracted to H, Na ions are purple and are attracted to O.
Purple represents Cl ions which are attracted to H, Na ions are green and are attracted to O.
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23. This is a silver nitrate solution. Run this simulation and, based on
information gathered from prior models and what you see happening here,
select the correct description.
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Orange spheres are Ag+ and blue spheres are nitrate ions
Orange spheres are Ag- and blue spheres are nitrate ions
Blue spheres are Ag+ and orange spheres are nitrate ions
Blue spheres are Ag- and orange spheres are nitrate ions
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