The indicator for standardization of HCl with standard solution of Na_{2}CO_{3} is ________. Bromocresolblue phenolphthalene methyl orange methyl red

Md Ariful Islam

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Both methyl orange and phenolphtalein can be used for standardisation.
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________ and ________ hormones bind to a receptor on the cell ________.

Epinephrine and nonepinephrine hormones bind to a receptor on the cell plasma membrane.

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Give the pH range of the following indicator: a) methyl red b) bromthymol blue c) phenolplthalein d) universal indicator solution

Methyl red=4.4-6.3

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An indicator is a weak acid and pH range of its colour change is 3.1 to 4.5.if the neutral point of indicator in the center of this pH range,What is ionization constant of the indicator?

The ionization equilibrium of the indicator:HA = H+ + A-ionization constant is: K = [H+]*[A-]/[HA]at neutral point: [A-] = [HA], hence, K = [H+]if the neutral point is in the...

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The indicator methyl red has a pKHIn = 4.95, If the indicator is placed in a colourless buffer solution of pH = 4.55 what colour will the solution be?

It will be red and slightly orange.There will be 72 % of red form and 28 % of yellow.

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In the standardization of a non-standard solution like HCl,titrate the solution of NaoH with HCl to the first permanent yellow colouration is _______ step. second third fouth fifth

second

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Theindicator for the acid- base titration in which the pH of solution end-point is 5-6 is ___________. any indicator phenolphthalein methyl orange no suitable indicator

methyl orange

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You want to make one mole of glycerine (C3H6O3). How many moles of each element must you use? Carbon (C): ________ Hydrogen (H): ________ Oxygen (O): __________

Solution:1 mole of glycerine (C3H6O3) has 3 moles of carbon, 6 moles of hydrogen and 3 moles of oxygen.Hence,Carbon (C): 3Hydrogen (H): 6 Oxygen (O): 3

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Calcium has_____ electrons in the outer layer which can be easily ________ in chemical reation. Ca is a _________ and Ca(OH)2 has ________ Properties.

Calcium has two electrons in the outer layer which can be easily lost in chemical reation. Ca is a alkaline earth metal and Ca(OH) 2 has alkaline Properties.

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what colour would the indicator cresol Red be at a pH of 4 Red Yellow Orange Colourless

Red

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If the number of people with the skills necessary to perform a job increases, labor ________ shifts to the ________. a. demand; left b. demand; right c. supply; left d. supply; right

a.     demand; left  supply; right

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