I am in high school and I am completing an assignment on a topic of my choice. For this, I have chosen to investigate the effects of saline concentration and pH levels on the absorption of water in sodium polyacrylate.
As many would know, sodium polyacrylate is a super-absorbent polymer which means it can absorb around 1000 times its own mass in water. Since the absorption is very high, I needed some help with formulating a method.
These are my current ideas:
1. Use a very small amount of sodium polyacrylate and finding how much water it absorbs by filtering out the water and measuring the mass increase.
2. Measuring the rate of absorption, however my teacher has advised against this.
Thanks for all your help in advance.