posted by .

The melting point of KCl is 776 C whereas the melting point of NaCl is 801 C.

1. Identify the type of bonding in each substance.

A: Both NaCl and KCl are ionic.

2. Account for the differences in the boiling points of the substances using principles of atomic structure, bonding, and/or intermolecular forces.

  • Chem -

    K+ is a larger ion than Na+. Therefore the K+ and Cl- ions can't get as close as the do with Na+ and Cl-. That results in a lower bond energy for KCl,
    So a lower KCl boilng point results because less thermal energy is needed to break the bond.

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Chemistry

    A sample of a mixture containing only sodium chloride (NaCl) and potassium chloride (KCl) has a total mass of 4.000g. When this sample is dissolved in water and excess silver nitrate is added a white precipitate (AgCl) forms. After …
  2. Chemistry

    Can someone check to see if my answers look ok. For the following crystals, explain how their melting points are related to the bonding forces and the crystal structure: a)Copper,Cu Copper has metallic bonds between atoms. It can occur …
  3. Chemisry

    Use chemical principles of atomic structure and or chemical bonding to explain each of the following. 1. At 25.0 degrees C and 1atm, F2 is a gas, whereas I2 is a solid. 2. The melting point of NaF is 993 degrees C, whereas the melting …
  4. Chemistry

    Which of the following is NOT true? (A) CH2O Has a relatively high boiling point due to hydrogen bonding. (b) BaCl2 is an example of an ionic sold. (c) Ionic solids are poor conductors of heat and electicity. (d) The melting point
  5. Chemistry

    Of each pair of solids, which one has the higher melting point?
  6. Chemistry

    Which compound would you expect to have the lowest melting point?
  7. general chemistry

    KCl crystallizes in a structure like NaCl. The ionic radius of Na+ is 0.525 times the ionic radius of Cl^- and 0.714 times the ionic radius of K+. What is the ratio of the density of NaCl to that of KCl?
  8. Solid State Chemistry

    Which molecule ( KI or LiF ) has the higher boiling point?
  9. chemistry

    Say you have two substances, A and B. A has a melting point of 300 degrees Celcius, while B has a melting point of 200 degrees Celcius. If you took a mixed melting point where the ratio of A is higher than B, what would the melting …
  10. chemistry

    a)Rank the following 3 tetrachloride compounds in terms of increasing boiling point: carbon tetrachloride (CCl4), methane (CH4), dichloromethane (CH2Cl2) b) Which molecule ( KI or LiF ) has the higher boiling point?

More Similar Questions