12 Answered Questions for the topic Dilution Calculations

Dilution Calculations Chemistry Ph

04/16/18

#### How many milliliters of concentrated HCl 12.1 M should be diluted to prepare 200.0 ml of an acid solution with a pH of 1.50?

This was an example for a exam review, not sure how to solve. A list of steps would be greatly appreciated, so I actually know how to solve it myself and can apply it to other examples like this.
Dilution Calculations Biology Microbiology Solutions

04/03/18

#### You are told to prepare 70% v/v bottle of ethanol to spray down a laminar flow hood.

You are told to prepare 70% v/v bottle of ethanol to spray down a laminar flow hood.The maximum volume on the spray bottle is 250 ml. You have a 95% v/v stock bottle bottle of ethanol. What volume... more
Dilution Calculations Biology Microbiology Solutions

04/03/18

#### What volume in ml do you need to prepare 100 ml a 10 mM solution of Tris....

What volume in ml do you need to prepare 100 ml a 10 mM solution of Tris (MWT 121 g/mol) from 500 ml of 0.5 M stock?
Dilution Calculations Biology Microbiology Solutions

04/03/18

#### What amount in gram do you need to prepare 25 ml of a 10% w/v solution of Tris (MWT 121 g/mol)?

What amount in gram do you need to prepare 25 ml of a 10% w/v solution of Tris (MWT 121 g/mol)?
Dilution Calculations Biology Microbiology Solutions

04/03/18

#### What amount in grams do you need to prepare 100ml of a 10mM solution of Tris (MWT 121 g/mol)?

What amount in grams do you need to prepare 100ml of a 10mM solution of Tris (MWT 121 g/mol)?
Dilution Calculations Chemistry Mass Chemistry Lab

03/20/18

#### Mass of Aspirin in a tablet

In a lab determining the mass of acetylsalicylic acid in an aspirin tablet, I'm having trouble with the dilution part of my calculation.   An unknown solution was made by placing an aspirin... more
Dilution Calculations Biology Microbiology Solution Dilution

03/13/18

#### What weight in grams would you need of Tris....

What weight in grams would you need of Tris (MWT 121 g/mol) to prepare 250 ml of a 10% w/v solution?
Dilution Calculations Biology Microbiology Solution Dilution

03/13/18

#### What volume in ml would you need to prepare 500 ml of a...

What volume in ml would you need to prepare 500 ml of a 50 mM solution of Tris (MWT 121 g/mol) from 1L of a 1M stock?
Dilution Calculations Biology Microbiology Solution Dilution

03/13/18

#### You counted 100 colonies of bacteria on a LB plate....

You counted 100 colonies of bacteria on a LB plate. The plate was created using 100 ul of a 1:100000 dilution. What was the number of bacteria in the original stock?
Dilution Calculations Chemistry Moles Solutions

03/06/18

#### Do moles change with volume?

Does increasing or decreasing volume change the moles in a solution, or does that just affect the concentration?   If I have 0.035711 moles in 100mL and I'm asked how many moles in 5mL of this... more
Dilution Calculations Biology Microbiology Solution Dilution

03/01/18

#### You count 1 x 10^6 cells/ml of cells with a hemocytometer,....

You count 1 x 10^6 cells/ml of cells with a hemocytometer. What volume in microliters do you need to seed a dish with 1 x 10^3 cells?

02/13/18

#### how to perform 1: 5 x 10^ 3 dilution ?

For determination of the number of yeast cells in suspension a counting chamber is used.However, the yeast suspension contains too many cells for direct counting. Hence a 1: 5 x 10^3dilution is... more

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