1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Stolb23 [73]
3 years ago
6

A scientist wants to make a solution of tribasic sodium phosphate, Na3PO4, for a laboratory experiment. How many grams of Na3PO4

will be needed to produce 650. mL of a solution that has a concentration of Na+ ions of 1.20 M ?
Chemistry
1 answer:
Harman [31]3 years ago
5 0
Na₃PO₄ -----> 3Na(+) + PO₄(3-)
y-y.......................3y...........y

3y = 1.2
y = 0,4M

Na₃PO₄ -----> 3Na(+) + PO₄(3-)
0,4-0,4..............1,2..........0,4
0.........................1,2..........0,4

C = n/V
n = C×V
n = 0,4×0,65L
n = 0,26 mol Na₃PO₄

mNa₃PO₄: (23×3)+31+(16×4) = 164 g/mol

164g ----- 1 mol
Xg -------- 0,26 mol
X = 164×0,26
X = 42,64g Na₂SO₄
You might be interested in
In the Bohr model of the atom, an electron in an orbit has a fixed _____.
Dvinal [7]
Orbit or energy level
3 0
3 years ago
Solid calcium hydroxide is dissolved in water until the pH of the solution is 10.44. Determine the concentration of the calcium
Orlov [11]

Answer:

1.38x10⁻⁴ M

Explanation:

First, we <u>calculate the pOH of the solution</u>, using the <em>given pH</em>:

  • pOH = 14 - pH
  • pOH = 14 - 10.44
  • pOH = 3.56

Now we <u>calculate the concentration of OH⁻</u>, using<em> the pOH</em>:

  • pOH = -log[OH⁻]
  • [OH⁻] = 10^{-pOH} = 2.75x10⁻⁴ M

Following the reaction Ca(OH)₂ → Ca⁺² + 2OH⁻, we divide [OH⁻] by 2 to calculate [Ca(OH)₂]:

  • [Ca(OH)₂] = 2.75x10⁻⁴ M / 2
  • [Ca(OH)₂] = 1.38x10⁻⁴ M
6 0
3 years ago
In the reaction, 2H2 + O2 --&gt; 2H2O, how many hydrogen molecules are needed to produce two water molecules?
Natali [406]
2 is the correct answer because with 2O2 molecules it balances the chemical equation.

Hope that helps
5 0
3 years ago
Help please! -A compound contains 0.013 moles of carbon, 0.039 moles of hydrogen and 0.0065 moles of oxygen. Determine the empir
stepan [7]

A) C2H6O1

To find the emperical formula, divide each mole value by the smallest

For carbon, 0.013/0.0065 = 2

For hydrogen, 0.038/0.0065= 6

For oxygen, 0.0065/0.0065= 1

Emperical formula = C2H6O1

8 0
3 years ago
Read 2 more answers
Calculate the solubility of ( = ) in moles per liter. Ignore any acid–base properties. s = mol/L Calculate the solubility of ( =
BaLLatris [955]

This is an incomplete question, here is a complete question.

Calculate the solubility of each of the following compounds in moles per liter. Ignore any acid-base properties.

CaCO₃, Ksp = 8.7 × 10⁻⁹

Answer : The solubility of CaCO₃ is, 9.33\times 10^{-5}mol/L

Explanation :

As we know that CaCO₃ dissociates to give Ca^{2+} ion and CO_3^{2-} ion.

The solubility equilibrium reaction will be:

CaCO_3\rightleftharpoons Ca^{2+}+CO_3^{2-}

The expression for solubility constant for this reaction will be,

K_{sp}=[Ca^{2+}][CO_3^{2-}]

Let solubility of CaCO₃ be, 's'

K_{sp}=(s)\times (s)

K_{sp}=s^2

8.7\times 10^{-9}=s^2

s=9.33\times 10^{-5}mol/L

Therefore, the solubility of CaCO₃ is, 9.33\times 10^{-5}mol/L

4 0
3 years ago
Other questions:
  • Help plz i don't know this
    8·1 answer
  • Any ions with a charge (3+ ) has?
    15·1 answer
  • HELP PLEASE. 50 points!
    10·2 answers
  • PLEASE HELP ME DUE TOMORROW IT REALLY HELPS IF YOU HELP ME THANK YOU SO MUCH IS YOU DO HELP ME!!
    14·1 answer
  • The part of the leaf containing the xylem and phloem is the:
    14·1 answer
  • 50 POINTS!!!!!
    10·2 answers
  • When calcium is allowed to react with nitrogen, calcium nitride is formed. If 24.0 g of calcium and 12.0 g of nitrogen are avail
    11·1 answer
  • HELPPP ASAP
    8·2 answers
  • How many moles of gas are in a 30 liter compressed air tank if the
    15·2 answers
  • Help me please (~ ̄- ̄)~​
    14·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!