It was decided to analyze a waste solution that contains an unknown concentration of mn2+ ions using colorimetry. a strong oxidizing agent was added to a 6.40 ml sample of the solution to convert the colorless manganese ions into purple permanganate ions. after the reaction is complete, the solution was diluted to 100.0 ml and analyzed in a colorimeter. the percent transmittance of the solution was determined to be 47.8 %. also a calibration curve was prepared by using a series of solutions with known concentrations of permanganate and the equation for the best fit line was found. y=1560⋅x+0.024 what is the absorbance of the permanganate in the diluted waste solution? absorbance = what is the concentration of the permanganate in the diluted waste solution? concentration of the permanganate = m what is the concentration of the mn2+ ions in the original waste solution? concentration of the mn2+ ions = m

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