Water's _____ property creates positive and negative ions, which are essential for chemical reactions

1 answer:

4 0

<span><span />It is water’s Ionization Property. Water Ionization also known as self-ionization or auto ionization of water creates a positive and Negative ion which is essential for chemical reactions. It is a reaction of pure water in where a water molecule and H2O combined to make a hydroxide ion. It usually occurs due to the electric field fluctuation between 2 neighbouring molecules. It is a property of pure water that mixed or dissociates to from a new substance which is a hydrogen ion (positive ion) and hydroxide ions (negative ion)</span>

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Assume that you have developed a tracer with first-order kinetics and k = 0.1 s − 1 . For any given mass, how long will it take

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Answer: It will take 6.93 sec for tracer concentration to drop by 50% and 13.9 sec for tracer concentration to drop by 75%

Explanation:

Expression for rate law for first order kinetics is given by:

$t=\frac{2.303}{k}\log\frac{a}{a-x}$

where,

k = rate constant = $0.1s^{-1}$

t = age of sample

a = let initial amount of the reactant = 100 g

a - x = amount left after decay process

a) for tracer concentration to drop by 50%

a - x = amount left after decay process = 50

$t=\frac{2.303}{k}\log\frac{100}{50}$

$t=\frac{0.693}{0.1}$

$t=6.93sec$

It will take 6.93 sec for tracer concentration to drop by 50%

b) for tracer concentration to drop by 75 %

a - x = amount left after decay process = 25

$t=\frac{2.303}{k}\log\frac{100}{100-75}$

$t=\frac{2.303}{0.1}\times \log\frac{100}{25}$

$t=13.9sec$

It will take 13.9 sec for tracer concentration to drop by 75%.

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PLEASE HELP ASAP ONLY HAVE 10 MINUTES. A certain photon of light has a wavelength of 422 x 10 -9 m. What is the frequency of the

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Answer:

7.11 x $10^{14}$ Hz

Explanation:

The equation for converting wavelength to frequency is ν=c/λ, or the speed of light over wavelength. The speed of light is 3.00 x $10^{8}$ , and our wavelength here is 422 x $10^{-9}$ . All we have to do now is substitute our given values: