Chem Lab

Am I right?

Classify the following properties of sodium metal as physical or chemical:
•Silver metallic color—physical property
•Turns gray in air—physical property
•Melts at 98º C-melting point is physical property
•Reacts explosively with chlorine gas—chemical property


Classify the following changes as physical or chemical:
•Water freezes at 0º C –physical change
•Baking soda when combined with vinegar produces bubbles—chemical change
•Mothballs gradually disappear at room temperature—physical change
•Ice cubes in a freezer get smaller with time—physical change
•Baking soda loses mass as it is heated-physical change
•Tarnishing of silver—chemical change

  1. 0
  2. 0
  3. 58
asked by Help1001
  1. Na turns gray in air. The gray color is physical, the reaction of Na to the oxide is chemical.

    Baking soda loses weight on heating due to NaHCO3 ==> Na2CO3 + H2O which is a chemical change.

    1. 0
    2. 0
    posted by DrBob222
  2. sodium metal is insoluble in ether.
    sodium metal dissovles in water to produce a gas.
    Oil dissolves in gasoline and gives a homogeneous solution.
    a drop of silver nitrate solution in a newborn's eye destroys the bacteria that can cause blindness.

    1. 0
    2. 0
    posted by Renee
  3. How would you show that dissolving table salt is a physical change?

    1. 0
    2. 0
    posted by Deby
  4. find out by urself

    1. 0
    2. 0
    posted by loldumb

Respond to this Question

First Name

Your Response

Similar Questions

  1. Chemistry

    I need help classifying these as physical and chemical properties! 1. sodium metal in chlorine gas releases luster. 2. sodium metal has a metallic silver luster. 3. sodium metal in water porduces hydrogen gas. 4. sodium metal

    asked by Emily Grossman on March 2, 2011
  2. chemistry

    Classify the following properties of ozones as physical or chemical: 1.bluish color 2.pungent odor 3.reactive towards oxygen 4.decomposes to oxygen on exposure to ultraviolet light 5.it is a gas Is this correct? 1.chemical

    asked by lizzie on February 20, 2008
  3. science

    What are two chemical and two physical properties of water? Please help me. Thank you. physical properties: boiling point, freezing point,density, color, electrical conductivity chemical properties: reactivity with sodium.

    asked by Jj on June 11, 2007
  4. integrated physics and chem

    Element A and element B have bonded and formed compound AB. Which of the following statements is true? A. Compound AB has chemical and physical properties that are completely different from those of A and B. B. Compound AB has

    asked by Anonymous on January 10, 2014
  5. IPC

    Element A and element B have bonded and formed compound AB. Which of the following statements is true? A) Compound AB has chemical and physical properties that are completely different from those of A and B. B) Compound AB has

    asked by Kaitlin on November 4, 2010
  6. scientist

    classify properties as chemical or physical for gold?

    asked by hner on October 19, 2009
  7. chem.

    sodium metal is insoluble in ether. sodium metal dissolves in water to produce a gas. The copper bottom on a frying pan turns black after several heatings. Are these physical or chemical changes..

    asked by Renee on February 16, 2011
  8. chem

    which metal has sililar properties (chemical/physical) to platinum metal?

    asked by Jake s on December 20, 2007
  9. Science

    1.what chemical properties of nail polish remover makes it dangerous? 2.Surgeons sometimes use metal plates and screws to hold broken bones together. What chemical properties do you think the metal should have?

    asked by Brianna on September 18, 2014
  10. Science

    Both carbon dioxide and water are pure substances. How are they similar to each other? A.) both substances have a set ratio of atoms that cannot be separated by physical means. B.) both substances have a set ratio of atoms that

    asked by Naomi on April 16, 2014

More Similar Questions