Name: _________________________________________________________________ Date:______________________
Title
Purpose
PreLab Guiding Questions
1 (a) – (g)
2
3
4 (a) – (c)
5 If your last name is A-H choose Mg2+, I-P choose Ca2+, Q-Z choose Fe2+
6 (a) – (c)
PART 1: PRACTICE WITH INSTRUMENTATION
Procedure Summary & Data Table
Procedure Summary (SUMMARY!!! Few sentences in paragraph form will suffice)
Data Table: (blank cells intentionally left for you to fill in)
Mass of Na2CO3
Mass of CaCl2
Molecular Equation: CaCl2(aq) + Na2CO3(aq)  CaCO3(s) + 2NaCl(aq)
Ionic Equation:
Net Ionic Equation:
Procedure Questions
1.
2.
3.
4.
5.
6.
7.
PART 2: INVESTIGATION (HARD WATER)
Detailed Materials & Safety (See MSDS Sheets in Schoology Assignment)
Detailed Procedure
Data Collection & Computation (obtain other groups data from Google spread sheet)
Samples
Blue Bell
Lower
Gwynedd
North Wales
Ambler
Whitpain
WHS
Volume
Filter paper
Filter paper +
CaCO3
CaCO3 (g)
Questions
1.
2.
3.
4.
Argumentation & Documentation
Sample Calculation:
"𝒙" 𝒈 𝑪𝒂𝑪𝑶𝟑 𝟏𝟎𝟎𝟎 𝒎𝒈 𝟏𝟎𝟎𝟎 𝒎𝑳
𝟏 𝒎𝑳 𝒔𝒂𝒎𝒑𝒍𝒆
x
x
x
~𝟐𝟎 𝒎𝑳
𝟏𝒈
𝟏𝑳
𝟐𝟎𝟎 𝒎𝑳 𝒉𝒂𝒓𝒅 𝒘𝒂𝒕𝒆𝒓
=
Letter to Client (complete the template below by completing areas in red. There should be nothing in red when you are
done)
Dear Client,
We have successfully quantified the amount of calcium ions in the samples that we received.
We were able to determine this information using gravimetric analysis.
Insert procedure SUMMARY!! (few sentences in paragraph form of INQUIRY procedure) here.
Below you can see our complete collection of data, which includes are colleagues findings, as well as our calculations:
Insert water hardness data table (which includes class data) here.
Insert a sample calculations here.
Although we may have (insert any explanations for possible sources of error here), we believe that our results are
accurate. We recommend that the following areas (….) need water softener, and we recommend that the homeowners
(…. do the following to soften their water)…
We hope that you find our results satisfactory, and we would be happy to answer any questions upon your request.
We look forward to hearing from you soon.
Sincerely,
Your Name
Post-Lab Assessment
1 (a)-(b)
2 (a)-(b)