Science Buddies: "Ask an Expert"

Hello! I desperately need help with my science fair project! It's due next week!!
1) I am doing a project about electrolysis and its effect on the pH of water, what can the title be?
2) What is an abstract? Does it replace an introduction or does it replace the research?
3) How can I measure 45g of magnesium sulphate without using a scale?
Thx!

Hi DesperateChild,

I'm assuming that you're working on the project described here:

https://www.sciencebuddies.org/science- ... ph#summary

You might want to use the title given in the project description. If not, here are a couple of suggestions:

“Mixing water and electricity: How does pH change during electrolysis of water?”

“Effects of electrolysis on pH”

An abstract is a short summary of your work that describes what you did, the results you observed and your conclusions. The abstract doesn't replace the introduction or any other part of your final report. You might want to take a look at the information at the following links for more details about abstracts and research reports:

https://www.sciencebuddies.org/science- ... nal-report

https://www.sciencebuddies.org/science- ... t-abstract

You really should weight out the 45 g of magnesium sulphate. If you don't have a kitchen scale at home perhaps you can use a scale at your school.

I hope this helps. Please ask again if you have more questions.

A. Norman

Thanks A lot!!!! You saved me!

Last Question! On the Epsom Salt/Magnesium Sulfate package, the instructions say "Dissolve 500g (equivalent to 2 cups or 500ml)..." So, does that mean 45 grams are equal to 45ml?

Hi DesperateChild,

The instructions on your Epsom Salt package imply that the density is 1 g/ml. If that is the case then 45 ml of magnesium sulfate weighs 45 g. You could try using 45 ml of magnesium sulfate if you don't have access to a scale for weighing it.

I hope this helps. Please ask again if you have more questions.

A. Norman

Thanks!!!