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
blagie [28]
3 years ago
6

A chemistry student weighs out 0.306 g of citric acid (H3C6H5O7), a triprotic acid, into a 250 ml volumetric flask and dilutes t

o the mark with distilled water. He plans to titrate the acid with 0.1000 M NaOH solution. Calculate the volume of NaOH solution the student will need to add to reach the final equivalence point. Be sure your answer has the correct number of significant digits.
Chemistry
1 answer:
laiz [17]3 years ago
4 0

Answer:

\boxed{\text{47.8 mL of NaOH}}

Explanation:

For simplicity, let's write the formula of citric acid as H₃A.

1. Balanced chemical equation.

\rm H$_{3}$A + 3NaOH $\longrightarrow$ Na$_{3}$A + 3H$_{2}$O

2. Moles of H₃A

\text{Moles of H$_{3}$A} =\text{ 0.306 g H$_{3}$A} \times \dfrac{\text{1 mol H$_{3}$A}}{\text{192.12 g H$_{3}$A }} = 1.593 \times 10^{-3} \text{ mol H$_{3}$A}

3. Moles of NaOH.

\text{Moles of NaOH} = 1.593 \times 10^{-3} \text{ mol H$_{3}$A} \times \dfrac{\text{3 mol NaOH} }{\text{1 mol H$_{3}$A}}\\= 4.778 \times 10^{-3}\text{ mol NaOH}

4. Volume of NaOH

V = 4.778 \times 10^{-3}\text{ mol NaOH}\times \dfrac{\text{1 L NaOH}}{\text{0.1000 mol NaOH}} = \text{0.047 78 L NaOH} =\textbf{47.8 mL NaOH}\\\\\text{The student will have to use }\boxed{\textbf{47.8 mL of NaOH}}

You might be interested in
What happens to population growth in a logistic growth pattern as it reaches carrying capacity?
Leno4ka [110]
I believe the answer would be C. slows down, hope this helps:) 
4 0
3 years ago
What does 3.5 degree of unsaturation tell you?
Kaylis [27]

Answer:

It means the chemical entity is a radical

Explanation:

When we talk of unsaturation, we are referring to the number of pi-bonds in a chemical entity. The alkane, alkene and alkyne organic family are used to as common examples to explain the term unsaturation.

While alkynes have 3 bonds, it must be understood that they have 2 pi bonds only and as such their degree of saturation is two.

In the case of an alkene, there is only one single pi bond and as such the degree of unsaturation is 1.

Now in this case, we have a fractional 0.5 degree of unsaturation alongside the 3 to make a total of 3.5. So what’s the issue here?

The fractional part shows that the chemical entity we are dealing with here is a radical. While the integer 3 shows that there are 3 pi-bonds, the half pi bond remaining tells us that there is a missing electron on one of the atoms involved in the chemical bonding and as such, the 1/2 extra degree of unsaturation tends to tell us this.

Kindly recall that a radical is a chemical entity within which we have at the least an unpaired electron.

5 0
3 years ago
How many moles of potassium chloride are in 28 grams of KCl?
stiv31 [10]

Answer:

0.3758moles

Explanation:

moles of kcl = mass of kcl/ molar mass of kcl = 28/74.5 = 0.3758moles

7 0
3 years ago
Read 2 more answers
Identify the element that has 23 protons
barxatty [35]

Answer:

Vanadium

Explanation:

3 0
3 years ago
Read 2 more answers
Properties of waves poem plzz help!!!!!!
GalinKa [24]

Answer:

They include frequency, period,speed,amplitude and phase

3 0
3 years ago
Other questions:
  • How many zn atoms are contained in 922 g of zn
    14·1 answer
  • A 5.00-ml sample of an h3po4 solution of unknown concentration is titrated with a 0.1090 m naoh solu- tion. a volume of 7.12 ml
    10·1 answer
  • Consider the reaction ch3oh(l)→ch4(g)+1/2o2(g). part a calculate δrh∘298.
    6·2 answers
  • The solid anhydrous solid CoCl2 is blue in color. Because it readily absorbs water from the air, it is used as a humidity indica
    15·1 answer
  • Radio waves are primarily used to
    6·1 answer
  • What is the mass of cyclohexane solvent, in kg, if 9.76 mL are used and the cyclohexane has a density of 0.779 g/mL?
    11·1 answer
  • How do protons, neutrons, and electrons differ in charge?
    15·1 answer
  • Your friend looks at a piece of ice and says “Solids, like ice, have a fixed shape because the particles are not moving.” Is you
    11·2 answers
  • Which of the following is the best definition of weather?
    9·2 answers
  • Culinary arts HELP FAST 1. Most people don't often think about science and restaurants or the food industry as
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!