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As a Ministry of Environment environmental technician, you are sent to take water for testing. Two of the test sites experienced fish kills and a third, without a fish kill, was used as a comparison site. In an attempt to explain why the fish died at these sites, the water was analyzed for the following chemicals:
SitepHNO31-PO43-Dissolved O2Suspended solidsA8.00.2 ppm0.2 ppm8.0 ppmLowB4.30.2 ppm0.2 ppm7.0 ppmHighC6.05.0 ppm6.0 ppm3.0 ppmMedium
Access the long description of the table.
Location of sample sites:
Your job is to provide an analysis of the test results to come up with a hypothesis for the experienced fish kills. Site A did not experience any fish kills and is used as a reference site.
- Determine the volume of 0.7M hydrochloric acid needed to fully neutralize 60 mL of 0.5M Ca(OH)2.
- If 50 mL of 1.2M H3PO4 is neutralized by 75 mL of NaOH, what is the concentration of the NaOH?
- What volume of 0.2M HNO3 acid would be needed to fully neutralize 1L of 0.4M KOH?
- 200 mL of 2M Sr(OH)2 fully neutralized 60 mL of H2SO4. What is the concentration of the acid?
Compare 1.0 mol/L sodium hydroxide with 1.0 mol/L ammonia (written as ammonium hydroxide) by recreating similar diagrams of dissociation and concentration as those provided to you for the acid comparison. Assume ammonia dissociates only 1%. What would you expect to see if you tested the conductivity and pH of each? Why is there a difference in reactivity if there is 1 mole of acid in a given litre?
Lean meat is marinated and added moisture through brining. In brining, a mixture of salt and water is used to soak the meat for a few hours or days before cooking.
Basic Brine: Make 3880 grams brine for 2.72 kg of meat
Procedure:
a. Mix 250 grams of salt (NaCl) with 3880 grams of water.
b. If you make sweet brine, mix 250 grams of sugar (C12H22O11) to solution of salt and water.
Problem: What is the molal concentration of the brine solution (250 g salt + 3880 g water)?
4.67g of solid silver nitrate are mixed into a 200.0mL solution of 0.500mol/L aqueous potassium sulfate.
1. Calculate the moles of each reactant
2. Identify which reactant is the limiting reactant
3. Calculate the moles of each product
4. Calculate the theoretical yield of solid precipitate
5. Assuming you get 3.88g of solid precipitate, calculate the percent yield
To keep homemade ice cream frozen, it is placed in a bucket of ice-water and salt mixture. A mixture is commonly composed of 1.90 kg of salt (NaCl) and 7.25 kg of ice.
Problem: Calculate the mole fraction of NaCl in the mixture until the ice melts.
Lean meat is marinated and added moisture through brining. In brining, a mixture of salt and water is used to soak the meat for a few hours or days before cooking.
Basic Brine: Make 3880 grams brine for 2.72 kg of meat
Procedure:
a. Mix 250 grams of salt (NaCl) with 3880 grams of water.
b. If you make sweet brine, mix 250 grams of sugar (C12H22O11) to solution of salt and water.
Problem: What is the molal concentration of the brine solution (250 g salt + 3880 g water)?
How many number is bonds are in allenne
A lagoon has a volume of 1200 m3 and the flow into the lagoon is 2.5 m3/h. What is the rentention time in this lagoon?
One gram of pepper is placed into a 100-mL beaker, and the beaker is filled with water to the 100-mL mark. What is the concentration of pepper in mg/L?
