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1) perform proper calculations and explain what happens with red blood cells after immersing it in the solution composed of 1 g of glucose (180g/mole )
and 50 ml of water
2 ) explain shortly if The change in glucose concentration in the human blood influences ontcotic pressure
3 ) what will be the change in pH decrease or increase or no change of the water solution of ammonia during titration of this solution with HCL ? At what percentage from (0 to 100 %) , indicator used in this titration (mentioned in a point a ) will be dissociated at equivalence point in case of using methyl orange as indicator what will be the colour of the soultion at the end point of this titration ?
4 ) what will be the colour of phenolphthalein in the water solution of soduim aceate ? What is the role of water according to acid base bronsted theory in the occuring reaction .
5 ) a) out of Cu ,Ca, Zn,Pb ,Si ,I,N ,Ba,Fe,Mg,H,Cl
choose all elements from the above which ions can be detected by flame test and write what colors will be seen. In this this for choosen elements
b) choose one element which ion can be detected by using silver nitrate explain shortly how to perform such reactions and what will be the characteristics effect
c ) choose all macro elements of human body and write them in form of ions ; write in which body fluid (extra fluid or intracelluar ) they are higher concentration .
6) perform proper calculations or answer what kind of distrubance in acid -base equilibrium occurs when concentration of H+ in the human plasama is 4.8 .10*8 mol/dm*3 and concentration of HCO3 *-is 25mM;
7 ) a)calculate pH of 0.003 mol/dm*3 KOH solution ;
B) calculate pH and OH-ions conc in KOH solution after two times dilution of the solution from a point a(two times dilution means that equal volumes of KOH sloution and water were mixed .
‘C ) patient recieved in injection 2 ml of solution containing 30 mg of medicine.calculate percentage concentration (m/v) of the medicine in the patients blood volume -5L
8 ) explain the influence of protien in form of polyanion on the difference in pH between red blood cell and plasma
9 ) a)what changes (increase or decrease or no change of freezing point ,boling point and osmotic pressure wil be observed during dilution of glucose solution .
shortly explain .
b) there are two kind of sols silver iodine and starch (polysaccharide ) which colloid is more susceptible for coagulation ? Explain shortly the answer
c) what kind of colloids are protiens (hydrophilic and hydrophobic) explain your answer
10 )a) write name od the reactive oxygen structure which is able to oxidize transition metals (in reactions occuring in human body ) and the name of oxygen free radical which is formed in such reactions ;which particle is more active ?
b) GSH and GSSG full form and what is the role of glutathione redcutase in relation to these structures ?
c) write the name of oxygen. Free radical which is formed in mitochondria of living cells also write the name of enzyme which can eliminate such radicals
1) How many mg of hcl are in 20/ml of the juice with ph 2 molar mass of hcl is 36.5 what is OH minus ions concentration in a solution with PH 2 ?
2) what is physiological range of blood pH ? How the increase of carbon dioxide can influence pH of the blood ? What should be the ratio between the components of the bicarbonate buffer to keep pH of the blood in physiological range ?
3) 0.9% (m/v) Nacl ( 58.5G/mole ) solution is physiological solution . Explain in words or calculation if 10 %of (m/v) saccharose (sucrose) (342g/m) solution can be treated as physiological solution
4 ) There are two water solutions 2 moles/dm*3 glucose (180g/mole ) and 2 moles /dm*3 kcal 74.5G/mole a) explain if the solution is isotonic b) which has lower melting melting point
On crossing a plant with red fruit and hairy stem, with one that was yellow fruit
and hairy stem, the following progeny were obtained:
30 red, hairy / 11 red, smooth / 29 yellow, hairy / 9 yellow, smooth
Give a reasoned explanation along with the use of full genetic diagrams to
proof your answer, to explain these results in terms of the simultaneous
transmission of characteristics.
1-Chloropropane was hydrolysed by an aqueous potassium hydroxide solution.
C3H7Cl + KOH → C3H7OH + KCl
1-Chloropropane Propan-1-ol
During the reaction, the reactant potassium hydroxide is used up. Samples of the reaction mixture were drawn off at regular time intervals and analysed by titration with standard hydrochloric acid to find out the concentration of KOH.
The results are given in the table below:
Time / s
Concentration of OH- / mol dm-3
0
0.500
100
0.350
200
0.250
300
0.180
400
0.125
500
0.090
600
0.063
700
0.040
800
0.030
From the above information, Plot a Concentration of OH- (mol dm-3) against Time (s) graph. The graph MUST be a hand drawn (plotted) graph.
(b)
Select 4 suitable points along your graph [see part (a)] and draw tangents to find the rates. Construct a table of “Rate” against “Concentration”. Note: The rates need to be calculated and the calculations shown.
(c)
Plot a graph of Rate against Concentration of OH-. The graph MUST be a hand drawn (plotted) graph.
(d)
From your graph in part (c) deduce the Order of Reaction with respect to OH- (hydroxide ions).
(e)
Write a rate equation with respect to concentration of hydroxide ions.
(f)
Calculate the rate constant k from the gradient of the graph, drawn in part (c). Show and explain your working.
A solution of 0.15M NH3 is only 1.1% ionized in solution. Calculate the pH. The Kb of ammonia is 1.8*10^-5
On crossing a plant with red fruit and hairy stem, with one that was yellow fruit and hairy stem, the following progeny were obtained:
30
red, hairy / 11 red, smooth /
2
9 yellow, hairy / 9 yellow, smooth
Give a reasoned explanation along with the use of full genetic diagrams to proof your answer, to explain
these results in terms of the simultaneous transmission of characteristics.
I take 1g of zinc metal and after dissolving, diluting it to 500 ml and adjust the PH of 50 ml of it to make titration with an unknown concentration of EDTA.
I found 1g of zinc took 25 ml of EDTA that means 0.004 g of zinc equivalent to 1ml of unknown concentration of EDTA.
My question is how can I calculate the concentration of EDTA from the above information?
In tomatoes, red fruit is dominant to yellow fruit and hairy stems are dominant to hairless (smooth) stems. The two genes controlling these traits are inherited in normal Mendelian fashion and are not linked.
a) Produce a suitable key for this information in terms of the individual alleles of the genes given.
b) What are the possible genotypes of plants showing the following forms:
i) Red fruit and smooth stems
ii) Yellow fruit and hairy stems
iii) Red fruit and hairy stems
c) On crossing a plant with red fruit and hairy stem, with one that was yellow fruit and hairy stem, the following progeny were obtained:
30 red, hairy / 11 red, smooth / 29 yellow, hairy / 9 yellow, smooth
Give a reasoned explanation along with the use of full genetic diagrams to proof your answer, to explain these results in terms of the simultaneous transmission of characteristics.
Determine at least two (2) industries that are currently exploring the potential of nanotechnology and give the pros and cons that are foreseen to be the effect of developing those nanotechnology?
How many moles of Sn4+ are reduced to Sn2+ by 1.00 C of electric charge?
