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Constructed Response . Topic 4: Chemical bonding
Set D: Molecular polarity, structures, shapes, properties of water, Lewis electron-dot diagram
Base your answers to questions 9 through 11 on the information below.
Water is a polar molecule because it is bent and has a definite
positive and negative side to it.
Write your answers here.
9. Draw the structure for a molecule of water, H2O. 9 and 10:
10. On your drawing, indicate with a “+” the positive side
and with “ – “ the negative side.
11. Describe one property of water that would change if 11.
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water molecule were a straight molecule and nonpolar.
Set E: Type of substances, properties of substances
Base your answers to question 12 and 13 on the table and information below.
The table below shows some properties of three solids: X, Y, and Z
Properties X Y Z
o
Melting Point ( C) 800 80 1200
Soluble in water yes no no
Solid state conducts electricity no no Yes
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Liquid state conduct electricity yes no yes
12. Classify solid X, Y, and Z as the followings: 12. Solid X :______________
Metallic, ionic, or molecular Solid Y: _______________
Solid Z: _______________
13. Explain, in terms of ions, why solid X would be able 13.
to conduct electricity when it dissolves in water.
Set F: Intermolecular forces, electronegativity, molecular and bond polarity
Write your answers here.
14. Explain, in terms of intermolecular forces, 14.
why hydrogen has a lower boiling point than
hydrogen bromide.
15. Explain, in terms of electronegativity difference, 15.
why the bond in H – Cl is more polar than the
bond in H – I.
16. Explain, in terms of molecular polarity, why 16.
hydrogen chloride is more soluble than
hydrogen in water under the same conditions
of temperature and pressure.
376 Copyright © 2010 E3 Scholastic Publishing. All Rights Reserved. Survivingchem.com
Set D: Molecular polarity, structures, shapes, properties of water, Lewis electron-dot diagram
Base your answers to questions 9 through 11 on the information below.
Water is a polar molecule because it is bent and has a definite
positive and negative side to it.
Write your answers here.
9. Draw the structure for a molecule of water, H2O. 9 and 10:
10. On your drawing, indicate with a “+” the positive side
and with “ – “ the negative side.
11. Describe one property of water that would change if 11.
Teacher Preview Copy
water molecule were a straight molecule and nonpolar.
Set E: Type of substances, properties of substances
Base your answers to question 12 and 13 on the table and information below.
The table below shows some properties of three solids: X, Y, and Z
Properties X Y Z
o
Melting Point ( C) 800 80 1200
Soluble in water yes no no
Solid state conducts electricity no no Yes
Teacher Preview Copy
Liquid state conduct electricity yes no yes
12. Classify solid X, Y, and Z as the followings: 12. Solid X :______________
Metallic, ionic, or molecular Solid Y: _______________
Solid Z: _______________
13. Explain, in terms of ions, why solid X would be able 13.
to conduct electricity when it dissolves in water.
Set F: Intermolecular forces, electronegativity, molecular and bond polarity
Write your answers here.
14. Explain, in terms of intermolecular forces, 14.
why hydrogen has a lower boiling point than
hydrogen bromide.
15. Explain, in terms of electronegativity difference, 15.
why the bond in H – Cl is more polar than the
bond in H – I.
16. Explain, in terms of molecular polarity, why 16.
hydrogen chloride is more soluble than
hydrogen in water under the same conditions
of temperature and pressure.
376 Copyright © 2010 E3 Scholastic Publishing. All Rights Reserved. Survivingchem.com
