Wednesday

September 3, 2014

September 3, 2014

Posted by **Jon** on Monday, September 16, 2013 at 7:55am.

2. When she reaches the storeroom she finds that there is no Na2HPO4, however there is a bottle of hydrate Na2HPO4 * 7H20. (FW=268.07) how many grams of this salt should she use in order to make 4 liters with the same phosphate concentration as above?

- Chem wondering how to set it up -
**Graham**, Monday, September 16, 2013 at 8:20am1)

Given:

V = 4[L]

m1 = 48.6[g]

w1 = 141.96[g/mol]

Use:

c = m1/(w1*V)

2)

Given:

w2 = 268.07

Use:

m2/(w2*V) = m1/(w1*V)

.: m2 = m1*w2/w1

- Chem wondering how to set it up -
**Jon**, Monday, September 16, 2013 at 9:25amI'm actually still confused by this

**Answer this Question**

**Related Questions**

Algebra 2 *edit*(below) - Hello I was wondering how this problem would be set up...

Chem - Calculate the [NH4+] in solution that is 0.25 M NH3 and 0.20 M NaOH. (Kb ...

Biochemistry - Please help! i was wondering why a genome size determined in a ...

Math - Translate and simplify "six less than twice the sum Of a number and three...

Foreign languages - Writeacher, could you help me write a sentence for each of ...

BIOCHEMISTRY - calculate the pOH of 3X106-6M of HF

Math - Daniel Filled the gas tank in his car with 14.6 gallons of gas. He then ...

St josephs - Machine set up is correct 60% of time & is incorrect 40% of time, ...

Mandelbrot Set - I have to find the first six terms of the sequence for the ...

Chemistry - To prepare a 400 mL solution of .7500 M NaC2H3O2, how many grams of ...