A solution of malonic acid, H2C3H2O4 , was standardized by titration with 0.1000 M NaOH solution. If 21.09 mL of the NaOH solution were required to neutralize completely 12.30 mL of the malonic acid solution, what is the molarity of the malonic acid solution

Explanation:

1000cm³ = 1mL = 1dm³

C₃H₄O₄ + 2NaOH → Na₂C₃H₂O₄ + 2H₂O

0.10M = 1000cm³

x M = 21.09cm³

xM = (21.09 * 0.10) / 1000

x M = 0.002109 moles

From equation of the reaction,

1 mole of C₃H₄O₄ reacts with 2 moles of NaOH

1 mole of C₃H₄O₄ = 2 moles of NaOH

y mole of C₃H₄O₄ = 0.002109 moles of NaOH

y = ( 0.002109 * 1 ) / 2

y = 0.0010545 moles

0.0010545 moles is present in 12.30cm³

0.0010545 mole = 12.30cm³

z mole = 1000cm³

z = (0.0010545 * 1000) / 12.30

Z = 0.0857M

The molarity of malonic acid is 0.0857M

both adhesion and cohesion are attractions.

they are different in that adhesion is the force of attraction between the molecules of two different substances, whereas cohesion is the force of attraction between molecules of the same substance.

possible examples include capillary action, in which the adhesion between water and glass causes the water to rise in a narrow tube against the force of gravity.

because of hydrogen bonding, water is extremely cohesive.

this causes molecules on the surface of water to be drawn inward, which is why drops of water form beads on smooth surfaces.

hope this .

it can be observed without changing the identity of the object.

it depends on what substance you're talking about as well as many other factors. in quantum mechanics, the observation of particles affects the observers ability to measure certain properties. for example: you can know the velocity of a particle, but you can't know it's position; or you can know it's position, but not it's velocity. it's like trying to find out where a grain of sand is by throwing other grains of sand at it. once you find out where it is, it's been moved. it's also like trying to find an answer to the question of whether or not a tree falling in a forest makes a sound if nobody is there to hear it. paradoxically, the only way to find out is to be there and hear it.