How is ultimate BOD calculated?
Ultimate BOD Calculator
- L = BODt (1-e-kt)
- L = BODt (1-e-kt)
- L = 150 (1-e-0.23×5)
What is the relationship between dissolved oxygen and biochemical oxygen demand?
BOD directly affects the amount of dissolved oxygen in rivers and streams. The greater the BOD, the more rapidly oxygen is depleted in the stream. This means less oxygen is available to higher forms of aquatic life.
How do you calculate the BOD of a water sample?
For example: 1.0 mL of a full strength wastewater sample added to 9.0 mL of DI water results in a 0.1 dilution of the wastewater. The DO concentration (mg/L) reduction must then be multiplied by 10 to determine the final BOD concentration.
What is the final dilution factor?
Dilution Factor is the factor by which the stock solution is diluted. It may be expressed as the ratio of the volume of the final diluted solution (V2) to the initial volume removed from the stock solution (V1), as shown in the equation above. Final Solution Volume (V2) is the final volume of the diluted solution.
How do you calculate the amount of water needed to dilute a solution?
To make a fixed amount of a dilute solution from a stock solution, you can use the formula: C1V1 = C2V2 where: V1 = Volume of stock solution needed to make the new solution. C1 = Concentration of stock solution.
What is a 2x dilution?
A two-fold dilution reduces the concentration of a solution by a factor of two that is reduces the original concentration by one half.
What is 10fold dilution?
A ten-fold dilution reduces the concentration of a solution or a suspension of virus by a factor of ten that is to one-tenth the original concentration. A series of ten-fold dilutions is described as ten-fold serial dilutions.
How do I make a 1 1000 dilution?
You could make 1/1,000 by adding 1 microliter of sample to 0.999 ml diluent. Why is that a poor choice? Because you can’t measure 1 microliter (or even 10 microliters) accurately with ordinary pipeters. So, make three serial 1/10 dilutions (0.1 ml [100 microliters] into 0.9 ml): 1/10 x 1/10 x 1/10 = 1/1,000.
How do you dilute a sample 10 times?
For example: if you needed 10 mL of the 1:10 dilution, then you would mix 1mL of the 1M NaCl with 9mL of water. Or: if you needed 100mL of the 1:10 dilution, then you would mix 10mL of the 1M NaCl with 90mL of water.
How do you make a 1 200 dilution?
200 (1/200 dilution) = the first step in the dilution factor; the second is 1/50, obtained as follows: 1 ml of serum + 199 ml of diluent = 1/200 dilution.
What is a 50% dilution?
You may come across something like, “prepare a 1:50 dilution of the solution”. What it means is, take a known volume of the stock solution (Vinitial) and add enough solvent to it so that the solution has a new volume, Vfinal, of 50 x Vinitial.
What is a 1% dilution?
In the given 1:1 dilution we combining 1 unit volume of solute with 1 unit volume of solvent to give 2 total units of total volume and in 1:2 dilution we combine 1unit of solute with 1 unit of solvent to give 3 total units of total volume .
How do you make a 1% solution?
A one percent solution is defined as 1 gram of solute per 100 milliliters final volume. For example, 1 gram of sodium chloride, brought to a final volume of 100 ml with distilled water, is a 1% NaCl solution. To help recall the definition of a 1% solution, remember that one gram is the mass of one milliliter of water.
What is a 3% solution?
3% v/ w solution means 3 ml of solute is dissolved in 100 grams of solution.
How do you make a 10% solution?
We can make 10 percent solution by volume or by mass. A 10% of NaCl solution by mass has ten grams of sodium chloride dissolved in 100 ml of solution. Weigh 10g of sodium chloride. Pour it into a graduated cylinder or volumetric flask containing about 80ml of water.
What quantity of a 60 acid solution must be mixed with a 30?
Since x + y = 300, that means that x = 200. So you will need 200 ml of 60% solution and 100 ml of 30% solution.
How many liters l of a 20% alcohol solution must be mixed with 60 l of a 90% solution to get a 80% solution?
Each L of the 20% solution contributes 0.2 L of alcohol and thus a total of 0.2x L of alcohol, while the 60 L of 90% solution contributes 54 L of alcohol. Solve for x: So you will need 30 L of the 20% solution.
How many liters of a 20% alcohol solution must be mixed with 60 liters of a 90% solution to get a 30% solution?
x=liters of 20% alcohol solution to be mixed with 60 liters of 90% alcohol solution. ans: 80 liters of a 20% alcohol solution must be mixed with 60 L of a 90% alcohol solution to get a 50% alcohol solution.
How many liters of a solution that is 30% alcohol must be mixed with 80 liters of a solution that is 90% alcohol to get a solution that is 60% alcohol?
That means you need 45 liters of the 30% solution.
How many Litres of 20% alcohol solution should be added to 40 Litres of a 50% alcohol solution to make a 30% solution?
Ans ; 80. Was this answer helpful?
How many liters of 70% alcohol solution must be added to 50 liters of a 40% alcohol solution to produce a 50% alcohol solution?
TAGS. How many liters of a 70% alcohol solution must be added to 50 liters of a 40% alcohol solution to produce a 50% alcohol solution? Hence Sol 1 will be 25.
Is alcohol a mixture?
Drinking alcohol (ethanol) is a not a mixture, but a pure substance that happens to be a liquid at room temperature and typical atmospheric pressure (your house). So, pure ethanol is not a solution, but all hard spirits are solutions.
When salt and water are combined they form a salt or saline solution how much water must be added to 150 mL of an 80% saline solution to produce a 30% saline solution?
ANSWER. The amount of water that will be added should be 250 mL to get 30% percent saline solution.