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
Readme [11.4K]
3 years ago
7

a 0.201 M aqueous solution of NaOH was used to titrate HCl in an aqueous solution. 30.5 ml of the NaOH was needed to neutralize

20.0 ml the acid a) write a balanced molecular equation of the reaction b) how many moles of NaOH were consumed for the reaction c) how many moles of HCl were neutralized d) calculate the concentration of the HCl solution
Chemistry
1 answer:
sukhopar [10]3 years ago
3 0
 chemical  equation
 (a) NaOH +HCL  --->NaCl  +H2O

(b)  THE  number  of  moles  reacted  is =  molarity x volume  in  litres
hence  the  number of  moles of NaOH=(o.201 x 30.5ml)/100ml=0.00613 moles

(C)  the  number  of   moles  of Hcl  that  were  reacted,  from    the  reaction  above   the  recting  ratio  of NaOH  to   HCl is  1:1  thus the  moles  of  HCl  is  also  0.00613

(D)
  my  of  HCl is  =moles/volume  in  litres
that  is (0.00613/20) x 1000=0.306M
You might be interested in
You can obtain a rough estimate of the size of a molecule with the following simple experiment: Let a droplet of oil spread out
mina [271]

Answer:

The diameter of the oil molecule is 4.4674\times 10^{-8} cm .

Explanation:

Mass of the oil drop = m=9.00\times 10^{-7} kg

Density of the oil drop = d=918 kg/m^3

Volume of the oil drop: v

d=\frac{m}{v}

v=\frac{m}{d}=\frac{9.00\times 10^{-7} kg}{918 kg/m^3}

Thickness of the oil drop is 1 molecule thick.So, let the thickness of the drop or diameter of the molecule be x.

Radius of the oil drop on the water surface,r = 41.8 cm = 0.418 m

1 cm = 0.01 m

Surface of the sphere is given as: a = 4\pi r^2

a=4\times 3.14\times (0.418 m)^2=2.1945 m^2

Volume of the oil drop = v = Area × thickness

\frac{9.00\times 10^{-7} kg}{918 kg/m^3}=2.1945 m^2\times x

x= 4.4674\times 10^{-10} m= 4.4674\times 10^{-8} cm

The thickness of the oil drop is 4.4674\times 10^{-8} cm and so is the diameter of the molecule.

6 0
3 years ago
What best explains the type of energy present in the vibrating atoms of a substance
luda_lava [24]
The type of energy present in the vibrating atoms of a substance is a thermal energy and it is a kinetic type of energy. It is associated with movement within the crystal lattice of substance. ... Eventually, it can lead to motion of the atoms which is a form of kinetic energy.
7 0
3 years ago
gypsum is insoluble in water. you are asked to purify a sample of gypsum that is contaminated with a soluble salt.
katen-ka-za [31]

Answer:

a. The apparatus required to purify gypsum sample are: Bunsen burner, beaker, Filter Funnel, stirring rod, the filter paper.

b. Gypsum is a sulfate mineral that is made up of calcium sulfate dihydrate. Step-by-step instruction to purify gypsum sample is as follows:

1. Add water to the gypsum sample in a beaker.

2. Use the stirring rod to mix the mixture well.

3. Filter off the excess solid from the mixture using the filter paper and filter funnel.

4. Put the filtered mixture over the bunsen burner and evaporate the excess water from the mixture.

5. Allow the hot liquid to cool down and filter it again through the filter paper to get the pure gypsum.

7 0
3 years ago
H₃C-Ç=CCH₃<br>сна сHз (what is the name of this <br> chemical formula)​
algol [13]

Answer:2,3 -dimethyl-2-butenr

Explanation:

3 0
3 years ago
The density of water at 400C is 0.992 g/mL What is the volume of 27.0 g of water at this temperature?
pantera1 [17]

Answer:

Volume of water at this temperature is 27.2 mL

Explanation:

We know that density=\frac{mass}{volume}

Here density of water is 0.992 g/mL

Here mass of water is 27.0 g

So volume=\frac{mass}{density}

                         = \frac{27.0g}{0.992g/mL}

                         = 27.2 mL

7 0
3 years ago
Other questions:
  • What can we use to determine the relative age of two rocks
    11·1 answer
  • What is the pH of a 5.09 x 10-5 M solution of NaOH?
    13·1 answer
  • CH, (g) + 20 (g) → CO(g) + 2H 0(g)
    9·1 answer
  • You prepare a solution by dissolving 3.9280 g of solid sodium hydroxide in 300 mL of distilled water in a 500 mL volumetric flas
    8·1 answer
  • How many moles of magnesium chloride (mgcl2) are in 1.31 l of 0.38 m mgcl2?
    9·1 answer
  • Humans exhale carbon dioxide when they breathe. If the concentration of carbon dioxide in the air that
    10·1 answer
  • What contribution did john dalton make to chemistry?
    10·1 answer
  • Why does Australian get more uv light than othet parts of the world?​
    11·1 answer
  • How many molecules are there in 5.9 moles of NaCl?
    6·1 answer
  • If you start with 4 moles of iron and 3 moles of oxygen to produce iron oxide, what is the limiting reagent? (You will need to b
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!