Ask questions about projects relating to: biology, biochemistry, genomics, microbiology, molecular biology, pharmacology/toxicology, zoology, human behavior, archeology, anthropology, political science, sociology, geology, environmental science, oceanography, seismology, weather, or atmosphere.
Moderators: MelissaB, kgudger, Ray Trent, Moderators
Equation # 1
p= m/v for us p= m-292 grams of salt over v- .946 liters of water Basically- 1 cup of salt in 1 quart of water- STOCK
p= 309 or 308.6 = Is this grams per mililiter? Is this the density of the salty water- our stock-?
Next, Equation # 2
new concentration - Volume of stock/(volume of stock + volume of water)
#1- 3/4 cup stock
#2- 3/4 cup stock & 3/4 cup water- new mix 50% or 1/2 stock
#3- 3/4 cup water & new mix 3/4 cup stock from #2 - 25% or 1/4 stock
#4- 3/4 cup water & new mix 3/4 cup stock from #3 - 12.5% or 1/8 stock
#5- 3/4 water
so, do we divide the 309 by 2, 4 , and 8 for the densities-absolute solutions- for cups 2-4??????????
Is the relative solutions the percentages?????????
Please Help??????? Project due tomorrow!
- Posts: 1
- Joined: Mon Oct 08, 2012 9:36 am
- Occupation: Student
- Project Question: Egg float! equation 1 we put Mass as 292 grams of salt. We put Volume as .946 for water. We got P- or density as 308.6 o6 309. in liters or grams or grams per liter. Now to figure out the Volume of stock. Is 309 the volume of stock? If so, them for relative solution we have 1 for cup 1, 50% for cup 2, 25% for cup 3, and 12.5% for cup 4. Then absolute solution will be 309 divided by 2 for cup 2(1/2), 4 for cup 3(1/4), and 8 for cup 4(1/8).
- Project Due Date: 10-8-12
- Project Status: I am finished with my experiment and analyzing the data
It looks like you are well on your way to understanding this experiment.
I would like you to take a look at the units you are using for equation #1. As you have stated the your mass is in grams and your volume is in liters. Therefore, with p=m/v your units would be grams per liter. As p represents the density, this is the density of your stock.
Please let me know if you have any follow-up questions.
- Posts: 22
- Joined: Thu Sep 06, 2012 9:37 am
- Occupation: Scientist
- Project Question: Ask the Expert Volunteer.
- Project Due Date: n/a
- Project Status: Not applicable
Return to Grades 6-8: Life, Earth, and Social Sciences
Who is online
Users browsing this forum: connief, Exabot [Bot] and 7 guests