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pH value of :
1) saliva (before meal)
2)saliva (after meal)
4)colourless aerated drink
can anyone give me some problems in the lesson electricity and magnetic field of electric current except the problems which is in the book
What is the Difference between Alkaline and basic?
what is pH paper exactly(full form)????
what is the ph of dil. sodium bicarbonate????
what is pH paper
A student adds a few drops of universal indicator to a solution and observes colour changes to orange. The solution would be : (a) strong acid (b) strong base (c) weak acid (d) weak base
What is the difference between pH paper and universal indicator ?
What will be the colour of the pH paper when we wil drop a liquid called Dilute Hydrochloric Acid , Dilute NaOH solution , Dilute Ethanoic Acid Solution ,Lemon Juicce, Water ,Dilute Sodium Bicarboate Solution. And pH paper value also.
what is the water of crystallisation of plaster of paris and gypsum. why is it so?
solutuion of kmno4 is added to ethanol drop by drop ...does the color of kmno4 persist when it is added initially?????why does color of kmno not disappears when excess is added????? plz help me dear experts and friends...
A student has four samples A, B,C and D containing dil.HCl, aq KCl, dil.NaOH, and distilled water respectively. The solutions with equal pH are:
(a) A and B
(b) B and C
(c) C and D
(d) B and D
what do you mean by brisk effervescence?
Are hydrogen and co2, both odourless and colourless gas?
which gas shows brisk effervescence?
what is combination reaction
what is the ph value of urea
What is the difference between adolescence and puberty? if you no the answer then please tell..are you intelligent?
what is the common between marble and eggshell?how can you test this common feature?
to show the combination reaction between quick lime with water is an exothermic reaction
what is the color of the solutions of NAOH , NAHCO3 and CH3COOH
magnesium ribbion float on water because of bubbles.but question is that waht bubbles provide magnesium ribbon to float?
How r pH and pOH related??????????????????/
Rahul adds aqueos solution of barium chloride to an aqueous solution of sodium sulphate. He would observe that
a. a pungent smelling gas is evolved.
b. the colour of the solution turns red.
c. a yellow pricipitate is formed after some time.
d. a white pricipitate is formed almost immediately.
how can we make a universal indicator
WHAT IS PH VALUE
A student detected the pH of four unknown solutions A,B,Cand D as flolows 11,5,7 and 2 predict the nature of the solutions
where can i get cbse last 20 or 10 years board papers of all subjects?
How is the pH value found?
what is bascicity of acids?
wat is the formula of washing soda,caustic soda,common salt,limestone
what is pH paper?
A moist litmus paper is introduced in a gas jar containing a gas. After sometime the paper becomes colourless. The gas present in the jar is ? (1.hydrogen2.Carbon dioxide 3.Sulphur Dioxide 4.Ammonia) Why?
What is distilled water?
Name the process due to which food materials like butter gets spoiled due to oxidation at room temperature if kept for long time.what happens to its taste and smell?
ph of nh4oh,nh4cl,
the colour of the pH paper changes according to the concentration of the hydrogen ions, so when the acid or base is added to water the hydrogen ions quantity is bound to change then why isn't it changing? is there a specific colour for each acid or base?
when a student dipped pH paper in the given solution, he found green colour. The given solution may be :
What does the scxale look like??
why litmus paper called as ph paper
A student took the following samples to find out their pH using pH paper. The teacher remarked that one of the samples taken was not proper. The teacher was referring to,
a) Dil.HCl b) Lemon juice c) Washing Soda d) Soap solution
what will happen if we mix water into acids?
i have got different values pH scale and the colour changes are also different in some samples. i havent used different solutions ,they are the same as the one in this video. how is this possible ? are there different types of pH paper or is there any mistake in the activity.
find the pH solution using the universal indicator solution of the following solutions:-HCL,NaOH,acetic acid,lemon juice,water,NaHCO3
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