Question

For each chemical reaction or physical change, record your observations (i.e. color changes, a ppt or solid formation, gas bubbles/odors, heat production, etc.). Observations should be detailed descriptions of WHAT you see, hear, smell, and feel. Recording a (+/–) is NOT an observation!

Short Answers:

1. Zn/HCl (single displacement) OBSERVATIONS:

2. NaHCO3/HCl (double displacement) OBSERVATIONS:

3. Sugar (C12H22O11) (decomposition) OBSERVATIONS:

4.CuSO4•5H2O (decomposition) OBSERVATIONS:

5. Fe/CuSO4 (single displacement) OBSERVATIONS:

6. NH3/HCl (combination) OBSERVATIONS:

7. Cu/HCl and Al/HCl (single displacement) OBSERVATIONS (for BOTH):

8. K2SO4/Ba(NO3)2 (double displacement) OBSERVATIONS:

9. NaOH/HCl (double displacement) OBSERVATIONS:

QUESTIONS:

1. Which procedure(s) [#1 – #9] were NOT chemical reaction(s) as predicted above (there are two!)? Write the reaction(s) including physical states. How were you able to determine this (i.e. one is a physical change and one procedure did not react = no reaction)?

2. Which procedure(s) [#1 – #9] produced water(g) vapor (there are two possibilities!)? Write the reaction(s) including physical states. Which procedure resulted in a physical change?

3. Which procedure(s) [#1 – #9] produced a gas other than water(g) vapor (there are three!)? Write the reaction(s) including physical states. 4

. Which procedure(s) [#1 – #9] produced a solid from two non-solids (there are two!)? Write the reaction(s) including physical states.

5. Which procedure(s) [#1 – #9] produced heat (there is one!)? Write the reaction including physical states. 1/25/2018 9/9

6. Which procedure(s) [#1 – #9] produced copper metal (there is one!)? Write the reaction including physical states.

7. What is the difference between the denotations (aq) and (l)? Give a specific example of each one.

Answer 1