SNC2D
Formal Lab: Ion Testing
Expectations:
SIV.01. demonstrate scientific investigation skills (related to both inquiry and research) in the four areas of skills (initiating
and planning, performing and recording, analysing and interpreting, and communicating);
CH2.03 investigate simple chemical reactions, including synthesis, decomposition, and displacement reactions, and
represent them using a variety of formats (e.g., word equations, balanced chemical equations) [PR, AI, C]
CH3.04 write word equations and balanced chemical equations for simple chemical reactions (e.g., 2H2 + O2 ? 2H2O)
CH3.05 describe, on the basis of observation, the reactants in and products of a variety of chemical reactions, including
synthesis, decomposition, and displacement reactions
CH3.08 identify simple ionic compounds (e.g., NaCl), simple compounds involving polyatomic ions (e.g., KNO3, NaOH),
using the periodic table and a list of the most common polyatomic ions (e.g., OH-, SO4-2), and write the formulae
Lab Report
1. Purpose:
2. Introduction: Briefly explain: ionic compounds, polyatomic ions, displacement reactions, and
chemical changes
3. Procedures: In paragraph form briefly explain the steps used to complete the lab.
a. Add 4-5 drops of the known substance (ion) to 4 different spots
b. Add 2 drops of the test substance to spot 1. Repeat with other test substances on each of
the known samples.
c. Use each test substance to determine unknown A
d. Use each test substance to determine unknown B
4. Observations: Include the observation table
5. Conclusions:
1. “All of the chemical reactions are double displacement reactions.” Explain
2. Test Reactions: The precipitates formed are with the ion you are testing for.
a. Describe the positive test for chloride (“When you add X...this happens if X ion is
present)
b. Write out the word equation and the balanced chemical equation (include states of
matter) for the test reaction for chloride.
c. Describe the positive test for iodide
d. Write out the word equation and the balanced chemical equation (include states of
matter) for the test reaction for iodide
e. Describe the positive test for sulfate
f. Write out the word equation and the balanced chemical equation (include states of
matter) for the test reaction for sulfate
g. Describe the positive test for iron
h. Write out the word equation and the balanced chemical equation (include states of
matter) for the test reaction for iron
i. Describe the positive test for cobalt
j. Write out the word equation and the balanced chemical equation (include states of
matter) for the test reaction for cobalt
3. Identify the unknown ions in each sample. Use your results/tests to justify.
4. In a paragraph describe 2 areas in which water testing may be important for a home owner.
Be sure to explain the reason for the test and why testing needs to be done.
Observation Table:
Known ions
(solutions)
Potassium
chloride solution
Sodium iodide
solution
Sodium sulphate
solution
Iron (III) nitrate
solution
Cobalt chloride
solution
Unknown A
Unknown B
Silver nitrate
solution
Testing Solutions
Barium chloride
Potassium
solution
thiocyanate
solution
Sodium
hydroxide
solution
Categories
Level 1
Level 2
Level 3
Level 4
(50 - 59%).
(60 - 69%).
(70 - 79%).
(80 - 100%).
Knowledge and Understanding:
understanding of ionic compounds
and balanced chemical equations
CH3.04, 05, 08 (introduction)
Demonstrates limited
understanding of
ionic compounds and
balanced chemical
equations
Demonstrates some
understanding of
ionic compounds and
balanced chemical
equations
Knowledge and Understanding:
understanding of ionic compounds
and balanced chemical equations
CH2.03, CH3.04, 05, 08 (conclusion
Q2)
Demonstrates limited
understanding of
ionic compounds and
balanced chemical
equations
Demonstrates some
understanding of
ionic compounds and
balanced chemical
equations
Thinking and Investigation:
gathers data and makes
observations from the
investigation.
CH2.03.
Thinking and Investigation:
analyzes the observations and
makes conclusions for ions in
unknown samples.
CH2.03.
Gathers data and
makes observations
from the investigation
with limited clarity.
Gathers data and
makes observations
from the investigation
with some clarity.
analyzes the
observations and
makes conclusions for
ions in unknown
samples limited logic.
Making Connections:
Makes connections with household
importance CHV.01
Makes connections
with household
importance limited
logic.
Uses equipment
correctly and follows
science safety rules
when investigating
ion tests with limited
clarity.
analyzes the
observations and
makes conclusions for
ions in unknown
samples with some
logic.
Makes connections
with household
importance with
some logic.
Uses equipment
correctly and follows
science safety rules
when investigating
ion tests with some
clarity.
Demonstrates
considerable
understanding of
ionic compounds and
balanced chemical
equations
Demonstrates
considerable
understanding of
ionic compounds and
balanced chemical
equations
Gathers data and
makes observations
from the investigation
with considerable
clarity.
analyzes the
observations and
makes conclusions for
ions in unknown
samples with
considerable logic.
Makes connections
with household
importance with
considerable logic.
Uses equipment
correctly and follows
science safety rules
when investigating
ion tests with
considerable clarity.
Demonstrates
thorough
understanding of
ionic compounds and
balanced chemical
equations
Demonstrates
thorough
understanding of
ionic compounds and
balanced chemical
equations
Gathers data and
makes observations
from the investigation
with high degree of
clarity.
analyzes the
observations and
makes conclusions for
ions in unknown
samples with high
degree of logic.
Makes connections
with household
importance with high
degree of logic.
Uses equipment
correctly and follows
science safety rules
when investigating
ion tests with high
degree of clarity.
Thinking and Investigation:
Writes out procedures and uses
equipment correctly and follows
science safety rules when
investigating ion tests
SI1.04, CH2.03.
Note: A student whose achievement is below Level 1 (50%) has not met the expectations for this assignment or activity.