Why is it necessary to do heating in analysis of cations?
1. Why is it necessary to do heating in analysis of cations?
Answer:
Experiment 7: Qualitative Analysis of Cations 1
Experiment 7: Qualitative Analysis of Cations1
Purpose: Develop a systematic scheme of separation and analysis of a selected group of cations.
Introduction
In this experiment you will separate and identify the cations in an unknown mixture. The
possible ions are Ag+
, Cu2+, Fe3+, Cr3+, Zn2+, and Ba2+. For the separation and detection of the
cations, you will use the ability of these ions to form precipitates, to form complex ions, or to
show amphoteric behavior (act as either an acid or a base). In the first week you do preliminary
tests with each cation to discover each ion’s characteristic behavior. From the data obtained, you
devise a scheme for separating and identifying this group of cations. In the second week you
apply this scheme to the analysis of an unknown containing one or more of these cations.
I. Sparingly Soluble Salts
Some cations form relatively insoluble salts that precipitate out of aqueous solution. For
example, chloride salts are generally soluble with the notable exceptions of the salts containing
Ag+
, Pb+2, and Hg2
+2. Similarly, most sulfate salts are soluble with the exceptions of BaSO4,
PbSO4, Hg2SO4, and CaSO4. The formation of a precipitate upon introduction of chloride or
sulfate into solution is a positive test for Ag+
or Ba+2, respectively.
Many hydroxide salts are also quite insoluble. For example, the solubility of Fe+3 ions in basic
solution is governed by the reaction:
Fe(OH)3 (s) →← Fe+3 (aq) + 3 OH-
(aq) (1)
The corresponding equilibrium expression is:
Ksp = [Fe+3][OH-
]
3
(2)
The Ksp of 6.3x10-38 shows that Fe(OH)3 is a very sparingly soluble salt under most conditions.
Equation (2) can be solved for the solubility of Fe+3 ions in solution:
solubility = [Fe+3] =
Ksp
[OH-
]
3
(3)
Therefore, solubility rapidly decreases as the solution becomes more basic, Figure 1.
Figure 1: Solubility of Fe(OH)3 and Zn(OH)2 as a function of pH.
0.000
0.002
0.004
0.006
0.008
0.010
2 3 4 5 6 7 8
Solubility (M)
pH basic
soluble
insoluble
Fe(OH)3 Zn(OH)2
acetic acid + acetate
buffer
2. 2. What kind of ion does the elements in Group 15 form?a. anionb. cationc. anion and cation d, inolecule
Answer:
C. Anion and Cation
Explanation: Ionic bond, also called electrovalent bond, type of linkage formed from the electrostatic attraction between oppositely charged ions in a chemical compound. ... The atom that loses the electrons becomes a positively charged ion (cation), while the one that gains them becomes a negatively charged ion (anion).
3. A cation is any atom or group of atoms with
A cation is any atom or group of atoms that has a net positive charge.
4. 5. chlorine atom needs one more electron to become octet. When it does gain one electron, what type of ion it forms? a. anion b. cation c. iodide d. atom 6. Aluminum is a cation, it has a charge of +3. What does this mean? a. It loses 3 electron b. It has more protons in a neutral atom c. It has more electrons a neutral atom d. It becomes an anion 7. Sodium ion has a charge of -1. It a cation. In what group number does it belong? a. Group IV A b. Group IIIA c. Group IIA d. Group IA 8. Which group of metallic elements in the periodic table will donate two of its valence electrons? A. Group IV A B. Group IIIA C. Group IIA D. Group IA 9. What is the name of a metal cation Ca+2? A. Calcium atom B. Calcium metal C. Calcium ion D. Calcium element 10. Fluorine is a non-metal. It will gain one electron to become octet. What type of ion will it form? A. Cation B. An ion C. Anion D. Atom Thank you in advance
Answer:
5. a
6. a
7. d
8. C
9. C
10. C
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5. 2. a cation is_______________because________________________
A cation is a positively charged ion withe fewer electrons than protons while the anion is negatively charged with more electrons than protons Because of their opposite electric charges; cations and anions attract each other.
I HOPE THAT CAN HELP
6. 2. How will you identify cations from anions?
Answer:
Cations are positively charged while the anions are the negatively charged atoms or molecules.
Explanation:
Atoms or molecules that lose electrons become. positively charged and are called cations. In contrast, those that gain electrons become. negatively charged are called anions.
Answer:
Consequently, they tend to lose electrons and form cations. Conversely, most nonmetallic atoms attract electrons more strongly than metallic atoms, and so gain electrons to form anions.Cation Anion
Cation AnionExamples Sodium (Na+), Iron (Fe2+), Ammonium (NH4+) Chloride (Cl-), Bromide (Br-), Sulfate (SO42-)
7. 20. A cation is any atom or group of atoms withA. a positive charge. C. no charge.B. a negative charge. D. more electrons than the corresponding atoms
Answer:
the answer is letter A
Explanation:
positive charge
Answer:
A. a positive charge.
Explanation:
hope it helps
8. What is the cation and anion. Write its corresponding charge.Cation
Answer:
A cation is a positively charged ion with fewer electrons than protons while an anion is negatively charged with more electrons than protons, because of their opposite electric charges; cations and anions attract each other and readily form ionic compounds.
9. Picture AnalysisGuided Question:1. How many Electrons and Protons have you observed in Cation?2. How many Protons and Electrons have you observed in Anion?3. Where does the Proton and Electron Located?4. How will you describe Cation and Anion based on the illustration?i need answer now plss sana matulungan nyooo akooo
Answer:
Guided Question:
1. How many Electrons and Protons have you observed in Cation?
• 12 protons, 10 electrons, 12 neutrons2. How many Protons and Electrons have you observed in Anion?
• 15 protons, 16 neutrons, 18 electrons3. Where does the Proton and Electron Located?
An anion is an ion that has gained one or more electrons, acquiring a negative charge. A cation is an ion that has lost one or more electrons, gaining a positive charge.4. How will you describe Cation and Anion based on the illustration?
•An anion is an ion that has gained one or more electrons, acquiring a negative charge. A cation is an ion that has lost one or more electrons, gaining a positive charge.10. in forming ions, Group 2A elements lose two electrons to become cations with a charge of +2 True or False
Question:
In forming ions, Group 2A elements lose two electrons to become cations with a charge of +2
True or False
Answer:
True
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11. find 2 compounds then identify if it is cation or anion
Answer:
Find 2 compound then identifu if it is catiom or anion.
Answer:
Examples of Cation:
1. Sodium or (NA+)
2. Iron or (Fe2+)
Examples of Anion:
1. Chrolide or C
2. Iodide or I
Explanation:
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12. Written Work No. 1 Directions: Classify the given ions into their respective group. Write your answer on the table provided. + K* 2- Rb* Be 24 CT Li 3- . S 2. Mg2+ CATION Anion
Answer:
thanks po sa points thank you
13. what is cation of Ca+2 , OH-
Answer:
calcium ion
Explanation:
PubChem CID 271
Structure
Calcium ion_small.png
Find Similar Structures
Molecular Formula Ca+2
Synonyms
calcium ion
Calcium cation
Calcium(2+)
Calcium ions
Calcium(2+)ions
More...
Molecular Weight
40.08 g/mol
Dates
Modify
2020-10-31
Create
2004-09-16
Calcium Cation is the metabolically-active portion of calcium, not bound to proteins, circulating in the blood.
NCI Thesaurus (NCIt)
Calcium(2+) is a calcium cation, a divalent metal cation and a monoatomic dication. It has a role as a human metabolite and a cofactor.
14. 2. a cation is__________because__________________________
Answer:
is a cation simple definition?
A cation is an ion with positive charge,
because ,which means it has more protons (positively-charged particles) than electrons (negatively-charged particles).
Explanation:
hope help Po
keep on learning
15. write the electron configuration for a boron cation with a charge of +2
Answer:
The electric configuration of Boron is 1s²2s²2p¹
16. 국 1. Observation and identifi- cation of the problem 2. Formulation of hypothesis 3. Experimentation 4. Data Analysis 5. Conclusion 6. Communicate your results
Answer:
what is the question in this subject
17. Sodium is a cation from group II A. It usually loses an electron because it is a A. MetalB. MetalloidC. noble gasD. non-metal
Answer:
a. A metal
Explanation:
its a alkali metal in table of elements
Answer:
A. metal
Sodium is cation, it usually loses an electron because it is a metal.
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18. If the charge on the metal cation is +3 what is the identity of the cation x+3?
Answer:
The alkali metals (the IA elements) lose a single electron to form a cation with a 1+ charge. The alkaline earth metals (IIA elements) lose two electrons to form a 2+ cation. Aluminum, a member of the IIIA family, loses three electrons to form a 3+ cation.
Explanation:
Brainliest Po Pls Last One Nalang!
19. How many groups of qualitative series cations are known?
Answer:
5 Group's
Explanation:
Group 1: Insoluble Chlorides.
Group 2: Acid-Insoluble Sulfides.
Group 3: Base-Insoluble Sulfides (and Hydroxides)
Group 4: Insoluble Carbonates or Phosphates.
Group 5: Alkali Metals.
-
20. What group of element forms cations after ionic bonding?
Ionic bonding is the complete transfer of valence electron(s) between atoms. It is a type of chemical bond that generates two oppositely charged ions. In ionic bonds, the metal loses electrons to become a positively charged cation, whereas the nonmetal accepts those electrons to become a negatively charged anion.Mar 3, 2017
21. Which of the following is true about electron deficiency? a. Electron deficiency indicates that an element is in a cation form. b. Electron deficiency indicates that an element is in anion form. c. Electron deficiency indicates a low number of valence electrons. d. Electron deficiency indicates that electrons are shared among a group of cations.
ANSWER:
C. Electron deficiency indicates a low number of valence electrons.
^_^
22. A cation is any atom or group of atoms with:a. a positive chargeb. a negative chargec. no charged. more electrons than the corresponding atoms
Answer:
A. A positive charge
Explanation:
A cation has more protons than electrons, giving it a positive charge.
23. Which two come together to form an ionic bond?a. a positive cation and a ngetaive cationb. a positive cation and a negative anionc. a positive cation and a positive aniond. a positive anion and a negative anion
Answer:
A
Explanation:
pa brainliest po(~￣³￣)~
24. 1. when an atom accepts an electron, it will become a. positively charged - anion b. positively charged - cation c. negatively charged - anion d. negatively charged - cation 2. as the atom releases electron, it will become a. positively charged - anion b. positively charged - cation c. negatively charged - anion d. negatively charged - cation
Explanation:
1 Letter C
2 letter c
hope it helps
25. Cation with a charge of +2
Answer:
iron(II)
Roman numeral notation indicates charge of ion when element commonly forms more than one ion. For example, iron(II) has a 2+ charge; iron(III) a 3+ charge.
26. true or false1.A cation is an atom or a group ofatoms bearing one or morepositive electric charges.2.Cations carry one or morepositive charges.3.Cations are formed from metalatoms.4Cations are attracted towards thenegative terminal (anode) of anelectric field.5.cations have equal numbers of protons and electrons.6. cations are larger in diameter than anions.7.sodium loses one electron to become stable resulting an ion that has a positive charge.8.An anion is an atom or a groupof atoms bearing one or morenegative electric charges.9.Anions carry one or morenegative charges.10.Anions are formed from bothmetal and non-metal atoms.11.Anions are attracted towardsthe positive terminal (cathode)of an electric field.12.Anions have more electrons than protons13. anions anions are smaller in size than cations14.fluorine loses one electron to become stable resulting in an area that has negative chargeTy po
Answer:
true
true
true
false
false
true
true
false
true
false
Explanation:
sana makatulong
27. group 13 elements form____.a. cations b. anions c. metald. both a and b
[tex]\huge\color{green} {\tt{Answer : }}[/tex]
[tex] \color{blue} \boxed{ \tt{metal}}[/tex]
_________________________________Group 13 elements form metal.
_________________________________#CarryOnLearning
28. A positively charged atom or group of atoms a. cation c. anion b. cathode d. anode
A positively charged atom or group of atoms
a. cation c. anion
b. cathode d. anode
Answer:
A. Cation
Explanation:
A cation is a positively charged ion that is attracted to the cathode in electrolysis. On the other hand, an anion is a negatively charged ion, as one attracted to the anode in electrolysis.
29. Directions: Fill in a Venn Diagram for comparing Cation from the Anion. CATION ANION
Answer:
Differences:
Cation:
positive charge ionformed by metals elementmore protons than electronslose electronsAnion:
negative charge ionformed by non metals elementmore electronsgain electronssimilarities:
both ion30. 37. Calcium forms an ion withcharge.a.-1b. +2d.-2C. +138. What kind of ion does the elements in Group 15 formęb. cationa. anionc. anion and cationd. molecu39. Which of the following forms -2 ions?a. Group 2d. Groupc. Group 16b. Group 1540. Why do atoms form ions?a. to be gasesc. to have 10 electrons alwaysb. to be stabled. to be unstable
Answers:
37. B. Calcium has a charge of 2+
38. B. Anion
39. C. Group 16
40. B. To be stable
Hope this helps
