لا أعلم ما هي المشكلة و لكن هذه هي الأسئلة
1) need to known the quantity of one or more components of a
sample :
Quantitative analysis
2) the sum of atomic weight ofatoms that make up a compound :
Gram – molecular weight
3) defined as the number of moles of solut dissolved per kilogram of solvent :
molality
4) water solution of ionic compounds :
conduct electricity
5) some compounds when dissolved in water conduct electricity very weakly :
weak electrolytes
6) Is a substance that contains hydroxyl group :
a base
7) Is a substance that exhibits to lose one or more protons :
an acid
8) Is any molecule or ion that can donate a pair of electrons :
a base
9) moe [H3O+]than water the solution is :
acidic
10) the reaction between acide and bases :
neutralization reaction
11) the number of molecules of the complexing agent :
ligand
12) EDTA is :
ethylene diamine tetra acetic acid
13) It is the gaining of electrons by shch particles:
Reduction
14) need to find the elements are present in a sample :
Qualitative analysis
15) the weight of a specified number of atoms of that element (avogadro's numder) :
Gram – atomic weight
16) the weight of substance in gram that will furnish mole of reacting unit :
********************alent weight
17) the number of moles of solute per liter of solution :
Molarity
18) water is a good solvent for :
ionic compound
19) solution of NaCl in water is:
conduct electricity
20) solution of suger in water :
non – electrolytes
21) Is a substance that contains hydrogen and give hydrogen ion in solution :
an acid
22) Is a substance that exhibits to gain protons:
a base
23) pure water is :
neutral and very weak electrolyte
24) more [OH-] than water the solution is :
basic
25)Hydrogen ion concentration in asolution is defined :
PH =-log[H+]
26) the solution that contains the precisely known concentration of solute is :
standard solution
27) solution with a variey of substances that have a pair unshared electrons :
complexes
28) Used for detemining chlride serves :
soludle
30)It is the process of losing electrons by an atom :
Oxidation
31) Iitmus paper are of two types:
pink and blue
32)are substances that from positive and negative ions in water :
Electrolytes
33) the number of oscillation of field per second :
Frequency
34) potassium permanganate the most widely used as :
oxidizing agent
35) the visible region of spectrum extend form about :
380 n m to about 780 n m
properties of bases :
1- produce [OH-] ions in water
2- taste bitter
3- feel soapy
properties of acids:
1- produce H+ ions in water
2- taste sour
3- corrode ****************ls
complete the flowing sentience:
1- the oxidizing agent is changed into reduced form
2- potassium permanganate the most widwly used as oxidizing agent
3- oxidation number of Mn in MnO4-2 is +6
4- the electromagnetic spectrum include gamma ray ,X-ray and UV
5- the same substancusually has different spectrum in different solvet
6- chemical formula of sulfuric acid is H2SO4
7- At room temperature most substances are in grounded state
8- Frequency is the number of oscillation of field per second
9- Used for determinaing chlorid serves the moher method
10- Used for ****************ls which are precipitated out of the solution in ph ranges necessary for indicator Back titration