A. Draw a graph that shows the relative concentration of BTB from the center of the drop to the edge of where the paper was wet.
See sample graph below question 3
b. In the above graph, did you have the concentration go to zero when you could no
longer see BTB? Or did you assume BTB was still there albeit at invisible levels?
c. Shade in the portions of both graphs where you were making assumptions (saying
things you have no evidence for) about the concentration of BTB.
2. From your data, could you infer that the paper towel is acidic? Explain.
3. How could you prove that your inference about the acidity of the paper is true?

For a family dinner, jose’s mom baked a loaf of bread. during the meal, his grandmother commented, “this bread is so dense! ” what do you think his grandmother meant by the word dense? you have some ideas regarding density already, but this experiment will enrich your understanding of the relationship between mass, volume and the density of objects. when making measurements in this experiment we will be using si units, the international system of units. the purpose of using si units is to have the ability to communicate and compare data results with other experiments without having to make conversions. measurement symbol si unit length m meter mass kg kilogram volume l liters density kg/l kilograms per liter any calculations that are performed during this experiment will ultimately be reported in scientific notation. recall that scientific notation is extremely important when we have data that is extremely small or large. scientists rely on a standard form of communication to quickly make hypotheses and judgements based on data. what is the density of block a? a0kg/l what is the density of block b? a1kg/l what is the density of block c? a2kg/l what is the density of block d? a3kg/l what is the density of block e? a4kg/l which block is the densest? a5