Toxic handlers

A solution is contaminated with traces of cadmium, manganese, and cobalt. Which option would be the safest way to make it safer for human consumption? ksp OH- CO32- S2- Cd2+ 2.5x10-14 1.8x10-14 8x10-28 Mn2+ 1.6x10-13 5.0x10-10 2x10-53 Co2+ 1.3x10-15 1.0x10-10 5x10-22 A bubble carbon dioxide into the water B raise the pH to about 12 C lower the pH to about 2 D increase the sulfide level

between 1960 and 2020 the concentration of atmospheric CO2 has increased by approximately?   Group of answer choices 100 ppm 320 ppm 400 ppm 420 ppm

None

Fill in the table

Calculate the concentration in ppm of Cd in a 2.00 mL sample which has been shown to contain 16.4 μg Cd. Assume the sample has a density of 1.00 g/mL. Show your work for full credits (just explain step by step and put the answer at the end)

What is the purpose of Safety Data Sheets? Why are these important when handling common food service chemicals? What information/components are generally included? How do Safety Data Sheets vary?

Hand written solutions are strictly prohibited.

Highest concentration of dye Lowest concentration of dye Answer Bank 3.0 mL dye and 3.0 mL water 2.0 mL dye and 6.0 mL water 2.0 mL dye and 0.0 mL water 20 µM dye solution 6.0 mL dye and 2.0 mL water

An action will elevate the concentrations of three chemicals in the drinking water supply: 1,1,1- trichloroethane to 2 mg/L, tetrachloroethylene to 0.04 mg/L and 1,1-dichloroethylene to 0.1 mg/L. Determine the lifetime risk of developing an undesirable health effect due to this exposure for a 50 kg adult who drinks 1 L/day of water containing these elevated pollution levels. Is there cause for concern? Why?

Is this correct for the diaper dissection lab

What is the concentration in parts per million of DDT in each of the following? a. 0.042 mg in 1,400 g plankton c. 2.0 mg in 1.0 kg needlefi sh tissue b. 5 × 10 −4 g in 1.0 kg minnow tissue d. 225 μg in 1.0 kg breast milk

Every valentine’s day, CVS sells chocolate-covered cherries.  The chocolate-covered cherries are like a mini cake with a cherry inside.  The cake comprises a combination of sucrose (powder sugar), butter, cherry juice, and an enzyme (invertase).  Time (hours) Sucrose Concentration (g/cm3) 0 0.844 24 0.681 48 0.550 96 0.357 192 0.153     While stored at 5.00C, the sucrose hydrolyzes to produce glucose and fructose.  The mixture of the glucose and fructose is a liquid called invert sugar. Below you will find the concentration of sucrose in the cake as a function of time.  For the cherries to be edible, the 85% of the sucrose must be hydrolyzed.  Before you start to answer the question, create a data table that comprises sucrose concentration in units of moles per liter.    Write the chemical reaction that demonstrates the hydrolysis of sucrose.   With the data, determine how long it will take for 85% of the sucrose to be converted into…

A factory is discharging wastewater containing 200 mg/L BOD into a river. The river has a discharge of 10 m3/s and the wastewater discharge is 2 m3/s.  If the upstream of this river has a BOD of 10 mg/L. Please compute BOD after wastewater is completely mixed with river (any BOD degradation is not considered).