Investigate how you can vary the properties of slime
This report will investigate if and how the concentration of sodium borate affects the viscosity of a sample of slime.
Background Information: …show more content…
If there were an increased volume of poly ethenol the slime would most likely be thicker. This is because it would be able to make a longer chain and expand.
The same volume of poly ethenol was used throughout the experiment.
Volume of the sodium borate
The volume of the sodium borate may have also affected the viscosity of the slime. The more sodium borate the thicker the slime because this would also lengthen the chain and cause the slime to expand.
The same volume of sodium borate was used throughout the experiment.
Temperature of the poly ethenol
Under pressure slime expands and becomes thicker. Perhaps it too, expands and thickens when under heat.
The temperature of the polyethenol and sodium borate solution was kept constant by completing the procedure on the same day at room temperature.
Temperature of the sodium borate
The same marble
It is important to use the same marble because this is what determines the viscosity of the slime. If the marble increased in mass, then it would hit the bottom of the beaker faster altering the overall results.
The same marble was used through out the …show more content…
This is important because the slime is dilatant, which means that under pressure it will expand and thicken. If the slime was kneaded longer than another slime sample it could have caused it to be thicker altering the overall results. This is a significant weakness.
In future experiments time the kneading process and keep it at a constant time throughout the experiment. For example kneading the slime for only one minute.
Systematic error: When adding water to dilute the sodium borate solution, the formula produced very precise numbers to two decimal places. These were impossible to measure accurately on a 50 cm3 measuring cylinder. This is an insignificant weakness.
In future experiments providing more precise equipment. For example using a 1 cm3-measuring cylinder, which has markings of decimal places. Or simply being provided with 5 different concentrations of the sodium borate solution, so there would be less chance of error or weakness in general.
Systematic error: It was difficult to see when the marble had reached the bottom of the beaker. This is an insignificant