-
Home
- Ut austin - principles of
- Inorganic
- Occurrence, preparation, and
Iron(II) can be oxidized to iron(III) by dichromate ion, which is reduced to chromium(III) in acid solution. A 2.5000-g sample of iron ore is dissolved and the iron converted into iron(II). Exactly 19.17 mL of 0.0100
M Na
2 Cr
2 O
7 is required in the titration. What percentage of the ore sample was iron?
Got questions? Get instant answers now!
How many cubic feet of air at a pressure of 760 torr and 0 °C is required per ton of Fe
2 O
3 to convert that Fe
2 O
3 into iron in a blast furnace? For this exercise, assume air is 19% oxygen by volume.
Got questions? Get instant answers now!
A 2.5624-g sample of a pure solid alkali metal chloride is dissolved in water and treated with excess silver nitrate. The resulting precipitate, filtered and dried, weighs 3.03707 g. What was the percent by mass of chloride ion in the original compound? What is the identity of the salt?
Got questions? Get instant answers now!
The standard reduction potential for the reaction
is about 1.8 V. The reduction potential for the reaction
is +0.1 V. Calculate the cell potentials to show whether the complex ions, [Co(H
2 O)
6 ]
2+ and/or [Co(NH
3 )
6 ]
2+ , can be oxidized to the corresponding cobalt(III) complex by oxygen.
E ° = −0.6 V,
E ° is negative so this reduction is not spontaneous.
E ° = +1.1 V
Got questions? Get instant answers now!
Predict the products of each of the following reactions. (Note: In addition to using the information in this chapter, also use the knowledge you have accumulated at this stage of your study, including information on the prediction of reaction products.)
(a)
(b)
(c)
(d)
(e)
(f)
Got questions? Get instant answers now!
Predict the products of each of the following reactions. (Note: In addition to using the information in this chapter, also use the knowledge you have accumulated at this stage of your study, including information on the prediction of reaction products.)
(a)
(b)
(c)
(d)
(e)
(f)
(a)
(b)
(c)
(d)
(e)
(f)
Got questions? Get instant answers now!
Predict the products of the following reactions and balance the equations.
(a) Zn is added to a solution of Cr
2 (SO
4 )
3 in acid.
(b) FeCl
2 is added to a solution containing an excess of
in hydrochloric acid.
(c) Cr
2+ is added to
in acid solution.
(d) Mn is heated with CrO
3 .
(e) CrO is added to 2HNO
3 in water.
(f) FeCl
3 is added to an aqueous solution of NaOH.
(a)
(b)
(c) In acid solution between pH 2 and pH 6,
forms
which is in equilibrium with dichromate ion. The reaction is
At other acidic pHs, the reaction is
(d)
(e)
(f)
Got questions? Get instant answers now!
Predict the products of each of the following reactions and then balance the chemical equations.
(a) Fe is heated in an atmosphere of steam.
(b) NaOH is added to a solution of Fe(NO
3 )
3 .
(c) FeSO
4 is added to an acidic solution of KMnO
4 .
(d) Fe is added to a dilute solution of H
2 SO
4 .
(e) A solution of Fe(NO
3 )
2 and HNO
3 is allowed to stand in air.
(f) FeCO
3 is added to a solution of HClO
4 .
(g) Fe is heated in air.
(a)
(b)
(c)
(d)
(e)
(f)
(g)
Got questions? Get instant answers now!
Balance the following equations by oxidation-reduction methods; note that
three elements change oxidation state.
Got questions? Get instant answers now!
Dilute sodium cyanide solution is slowly dripped into a slowly stirred silver nitrate solution. A white precipitate forms temporarily but dissolves as the addition of sodium cyanide continues. Use chemical equations to explain this observation. Silver cyanide is similar to silver chloride in its solubility.
As CN
− is added,
As more CN
− is added,
Got questions? Get instant answers now!
Give the oxidation state of the metal for each of the following oxides of the first transition series. (Hint: Oxides of formula M
3 O
4 are examples of
mixed valence compounds in which the metal ion is present in more than one oxidation state. It is possible to write these compound formulas in the equivalent format MO·M
2 O
3 , to permit estimation of the metal’s two oxidation states.)
(a) Sc
2 O
3
(b) TiO
2
(c) V
2 O
5
(d) CrO
3
(e) MnO
2
(f) Fe
3 O
4
(g) Co
3 O
4
(h) NiO
(i) Cu
2 O
(a) Sc
3+ ; (b) Ti
4+ ; (c) V
5+ ; (d) Cr
6+ ; (e) Mn
4+ ; (f) Fe
2+ and Fe
3+ ; (g) Co
2+ and Co
3+ ; (h) Ni
2+ ; (i) Cu
+
Got questions? Get instant answers now!
Questions & Answers
the study of living organisms and their interactions with one another and their environments
AI-Robot
HOW CAN MAN ORGAN FUNCTION
the diagram of the digestive system
allimentary cannel
Ogenrwot
They formed in two ways first when one sperm and one egg are splited by mitosis or two sperm and two eggs join together
Oluwatobi
Genetics is the study of heredity
Misack
how does twins formed?
Misack
discuss biological phenomenon and provide pieces of evidence to show that it was responsible for the formation of eukaryotic organelles
the study of living organisms and their interactions with one another and their environment.
Wine
discuss the biological phenomenon and provide pieces of evidence to show that it was responsible for the formation of eukaryotic organelles in an essay form
list any five characteristics of the blood cells
Shaker
lack electricity and its more savely than electronic microscope because its naturally by using of light
advantage of electronic microscope is easily and clearly while disadvantage is dangerous because its electronic. advantage of light microscope is savely and naturally by sun while disadvantage is not easily,means its not sharp and not clear
Abdullahi
cell theory state that every organisms composed of one or more cell,cell is the basic unit of life
Abdullahi
is like gone fail us
DENG
cells is the basic structure and functions of all living things
Ramadan
is organisms that are similar into groups called tara
Yamosa
in what situation (s) would be the use of a scanning electron microscope be ideal and why?
A scanning electron microscope (SEM) is ideal for situations requiring high-resolution imaging of surfaces. It is commonly used in materials science, biology, and geology to examine the topography and composition of samples at a nanoscale level. SEM is particularly useful for studying fine details,
Hilary
cell is the building block of life.
Got questions? Join the online conversation and get instant answers!
Source:
OpenStax, Ut austin - principles of chemistry. OpenStax CNX. Mar 31, 2016 Download for free at http://legacy.cnx.org/content/col11830/1.13
Google Play and the Google Play logo are trademarks of Google Inc.