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
Vitek1552 [10]
3 years ago
9

Una solución contiene 25.10 ml de H2SO4 (densidad de 1.34 g/ml). Calcular la molaridad, moralidad, normalidad, fracción molar de

l soluto y fracción molar del solvente sabiendo que el ácido está disuelto en 426 ml de agua
Chemistry
1 answer:
aliina [53]3 years ago
8 0

Answer:

Molaridad: 0.80 mol/L

Molalidad: 0.80 mol/kg

Xst: 0.014

Xsv: 0.986

N: 1.6 Eq/L

Explanation:

Volumen de soluto: 25.10 mL (ácido sulfúrico)

Volumen de solvente: 426 mL (agua)

Sabemos que la densidad del acido es 1.34 g/mL, por lo que podemos calcular así la masa de ácido en solución:

1.34 g/mL = masa / volumen

1.34 g/mL . 25.10 mL = 33.6 g

Con la masa molar, calculamos moles: 33.6 g . 1 mol / 98g = 0.343 moles

Molaridad: (moles de 1 soluto en 1 L de solución)

Convertimos mL a L, asumimos que el volumen de solvente es el volumen total: 426 mL . 1L / 1000 mL = 0.426 L

0.343 mol / 0.426 L =  0.80 M

No existe moralidad en Quimica, asumo que es molalilad

La molalidad señala moles de soluto en 1 Kg de solvente. Necesitamos la masa de solvente que calculamos a traves de la densidad del agua:

1 g/ mL = masa / volumen

1 g/mL . 426 mL = 426 g de solvente

Convertimos a kg → 426 g . 1 kg / 1000 g = 0.426 kg

0.343 mol / 0.426 kg = 0.80 m

Para las fracciones molares sumamos los moles de cada compuesto

Moles de soluto + moles de solvente = Moles totales

Xst = moles de soluto / moles totales

Xsv = moles de solvente / moles totales

Los moles de solvente son: 426 g . 1mol / 18g = 23.67 moles

0.343 mol st + 23.67 mol sv = 24.013 moles

Xst = 0.343 / 24.013 = 0.014

Xsv = 23.67 / 24.013 = 0.986

La normalidad señala la cantidad de equivalentes de soluto, contenidas en 1L de solución:

Se calculan los Eq como (masa molar / N° de H⁺ u OH⁻ si es base)

Eq acido sulfurico = 98 g / 2 = 49 Eq

(Dividido 2 porque son 2 H⁺)

Eq acido sulfurico en 33.6 g = 33.6 g / 49 → 0.686 Eq

N = 0.686 Eq / 0.426 L → 1.61 N

Si la cantidad de H⁺ para un acido o de OH⁻ para una base es 1:

Molaridad = Normalidad

Si la cantidad es el doble podemos decir:

2 . M = N

Si verificamos, 2 . 0.8 M = 1.6 N

You might be interested in
When we write the formula for an ionic compound, we are merely indicate the "molecules" in the compound with that formula. expla
belka [17]
When writing an ionic compound formula, a "molecular" form is used.  The formula is made with allowance for ion charges.
For example,
Ca²⁺ and NO₃⁻ ⇒ Ca(NO₃)₂
Al³⁺ and SO₄²⁻  ⇒ Al₂(SO₄)₃
3 0
3 years ago
Ibuprofen, a well‑known, non‑steroidal anti‑inflammatory drug, has chirality.
Liula [17]

Answer:

A (True)

Explanation:

Because ibuprofen has a chiral carbon center (carbon bonded to 4 distinct groups of atoms).

This means that a mixture of ibuprofen can rotate plane-polarized light equally in both the clockwise and counterclockwise direction.

8 0
2 years ago
Read 2 more answers
Determine which ordered pairs fall on the graph of f(x) = -2x-1 Show all of your work for each ordered pair. Ordered Pairs: (1,1
Nadusha1986 [10]

i just learnt this recently but i need to look through my notes again.

8 0
3 years ago
Which of the following is true of a buffered solution? Group of answer choices All of these are true The solution resists any ch
olya-2409 [2.1K]

Answer:

All of these are true

Explanation:

A buffer solution in chemistry is a solution that resists changes in pH when an acid or base is added to it. It is a solution that contains a weak acid and its conjugate base (anion) or a weak base and its conjugate acid.

A buffer is able to resist a change in pH due to the conjugate base and conjugate acid of the weak acids and bases contained in them respectively. The conjugate base/acid are present in an equilibrium quantity with their acid/base counterparts and help to neutralize or react with any additional H+ or OH- from an acid or base added to their solution.

However, when a strong acid or base is added to the buffer solution, there is only a slight change which practically does not change the pH of the solution.

Hence, all of the above options about a buffered solution is true.

5 0
3 years ago
Mr. Romeo wants to make a solution of NaOH. He measures out 97.68 grams and puts it into 3 liters
Studentka2010 [4]

Answer:  Molarity of the solution is 0.813 M.

Explanation:

Given : Mass of NaOH = 97.68 g

Volume of solution = 3 L

The molar mass of NaOH is 39.99 g/mol. Hence, moles of NaOH are calculated as follows.

No. of moles = \frac{mass}{molar mass}\\= \frac{97.68 g}{39.99 g/mol}\\= 2.44 mol

Molarity is the number of moles of solute present in a liter of solution. Therefore, molarity of given solution is calculated as follows.

Molarity = \frac{no. of moles of solute}{Volume (in L)}\\= \frac{2.44 mol}{3 L}\\= 0.813 M

Thus, we can conclude that molarity of the solution is 0.813 M.

8 0
3 years ago
Other questions:
  • Determine the number of ch2cl2 molecules in 25.0 g ch2cl2.determine the number of ch2cl2 molecules in 25.0 g ch2cl2.
    9·2 answers
  • What does a geologist study
    8·2 answers
  • Pls help solving question (d)!!
    7·1 answer
  • A student reacts 13 moles of iron with 21 moles of oxygen according to the following equation:
    10·1 answer
  • 015
    14·1 answer
  • One of the reagents below gives predominantly 1,2 addition (direct addition) while the other gives predominantly 1,4 addition (c
    5·2 answers
  • In a sample containing a mixture of only these gases at exactly one atmosphere pressure, the partial pressures of carbon dioxide
    11·1 answer
  • Avogadro's number 6.02 X 10^23 is used in chemistry to measure something like electrons, atoms, elements etc. Question 1 options
    5·2 answers
  • Please help quick<br> Alkali means ___.
    14·1 answer
  • 15 Points. Pls give a real answer this is due in an hour.
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!