1.Size- Less than 2 mm in diameter .
2.Surface area- The smaller the particle size in a given mass of soil, the greater the surface area.
3.Surface Charge- Have positive or negative electrostatic charges.
4.Adsorption of ions- Negatively charged soil colloids attract cations e.g. Al3+, Ca2+, Mg2+, K+, Na+,H+
while positively charged colloids attract anions e.g. NO3-, SO42-, Cl- 5.
5.Adsorption of water- Colloids attract and hold large number of water molecules due to the polar nature of water molecules.
jim items answered the question on October 19, 2018 at 09:49
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Discuss the eight main steps a form four student ought to follow when determining the concentration of an acid using a known base in the...
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October 13, 2018
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October 8, 2018
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October 8, 2018
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September 30, 2018
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State two main uses of sodium hypochlorite
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September 25, 2018
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August 22, 2018
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A student was provided with the following chemicals. Describe consecutively how to test presence of nitrates in sample solution
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A student was provided with the following chemicals
•4 cm^3 sample solutions in a test tube(KNO3)
•1M Sodium hydroxide
•Aluminium foil
•Source of heat
•Red and blue litmus paper
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Date posted:
August 22, 2018
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Give two factors one should consider in siting carbonate manufacturing plant
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August 22, 2018
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The following are steps carried by a student during a chemistry practical to determine the concentration of an acid using...
(Solved)
The following are steps carried by a student during a chemistry practical to determine the concentration of an acid using a known concentration of a base. Study the steps and answer the questions that follows(note:Steps are not consecutively)
(a) Rinse conical, pipette and burette using distilled water
(b)Assemble apparatus required set them
(c) Pour HCL to a burette
(d) Put a funnel on top of a burette
(e) Open burette tap to adjust volume of acid to a mark
(f) Add three drops of phenolphthalein indicator into conical flask.
(g) Titrate burette contents(acid) against conical contents(base) until the pink colour just disappear
(h) Suck 1M sodium hydroxide using pippete
and transfer to conical flask.
(I) Record the volume of acid used and repeat the procedure.
Questions
(I)Using alphabets (a-i) give the correct order of steps
(II) Why is it necessary to add an indicator to contents in conical flask and not the ones in burette?
(III) How can one determine end point?
(Iv) Write balance equation between acid and base
Date posted:
August 20, 2018
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Answers (1)
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(a) Define the following terms (I) Molar mass (II) A molar solution (III)Standard Solution (Iv)End point
(Solved)
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Date posted:
August 20, 2018
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(Solved)
State two advantages of using natural polymers over synthetic ones
Date posted:
August 19, 2018
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(Solved)
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Date posted:
August 19, 2018
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Date posted:
August 19, 2018
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(Solved)
On complete combustion of a hydrocarbon gas X, 1.32g of carbon (IV) oxide and 0.54g of water. Calculate the empirical formula of X (C = 12.0, H = 1, O = 16.0)
Date posted:
August 19, 2018
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Answers (1)
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Study the following information and answer the question that follows
(Solved)
Study the following information and answer the question that follows.
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Date posted:
August 19, 2018
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Answers (1)
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(Solved)
Distinguish between a strong acid and a concentrated acid
Date posted:
August 19, 2018
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Answers (1)
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Give two reasons why during preparation of salt, it is advisable to heat the solution to concentration allowing it to cool in order to crystallize
(Solved)
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Date posted:
August 19, 2018
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Answers (1)
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In an experiment it was found that 40.0cm3 of 0.2M sodium hydroxide solution just neutralized 0.2g of a dibasic acid Q..
(Solved)
In an experiment it was found that 40.0cm3 of 0.2M sodium hydroxide solution just neutralized 0.2g of a dibasic acid Q. Calculate the relative molecular mass of acid Q.
Date posted:
August 19, 2018
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Answers (1)
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The nitrates of the following metals were heated strongly and observation made accordingly. The nitrate of metal P produced the metallic oxide, Nitrogen (IV) oxide and oxygen gas
(Solved)
The nitrates of the following metals were heated strongly and observation made accordingly. The nitrate of metal P produced the metallic oxide, Nitrogen (IV) oxide and oxygen gas; and that of metal Q produced the metallic nitrite and oxygen gas. The nitrate of R produced metal R, Nitrogen (IV) oxide and oxygen gas. Arrange the metals in order of reactivity beginning with the most reactive
Date posted:
August 19, 2018
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Answers (1)
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A student was asked to prepare Lead (II) chloride salt using the following ingredients; Nitric (V) acid, lead (II) oxide and hydrochloric..
(Solved)
A student was asked to prepare Lead (II) chloride salt using the following ingredients; Nitric (V) acid, lead (II) oxide and hydrochloric acid. Using ionic equations only explain how the salt can be prepared.
Date posted:
August 19, 2018
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Answers (1)