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⚫️⚫️ + ⚪️⚪️ What the product of this chemical reaction?
How many gram of ammonia should be added to 500mL of 1M ammonium chloride to give a pH 9?(Ka ammonium=5.6x10-10)
What is the pH of the solution of 35 mL 0.20 M formic acid and 55mL 0.10 M sodium formate in 110 mL water? (pKa formic acid=3.75)
Calculate the ratio of [CH3COOH]/NaCH3COO] to give a buffer solution at pH 5.(Ka of acetic acid = 1.8 x 10^-5)
Imagine yourself and the people around you as atoms. Just like atoms,
you need to form bonds to be more stable. Your attitude, talents and potentials, love
and care, advises and compliments, and the things you treasure should serve the
function of electrons. Based on your understanding on the concept of ionic and
covalent bonds, what type of bond do you want to form with other people? What do
you want to do with your electrons? Support your answer.
A reaction of a reagent A with a reagent B shows the following rate data when studied at different concentrations of A and B
1) 0,2| 0,2 |8,0X10-4
2)0,4| 0,2 | 3,2 X10-3
3) 0,1 | 0,2 | 2,0X10-2
4) 1,0 | 1,0 | 2,0X10-2
Find:
The value of the speed constant
The orders of each reagent
The velocity when [A] = [B] = 0.5 M
The value of the speed constant
The orders of each reagent
The velocity when [A] = [B] = 0.5 MGiven the following reaction at equilibrium, if Kc = 1.90 × 1019 at 25.0 °C, Kp = ________.
H2 (g) + Br2 (g) 2 HBr (g)
Nitrogen dioxide decomposes to nitric oxide and oxygen via the reaction:
2NO2 → 2NO+ O2
In a particular experiment at 300 °C,
[NO2
]
drops from 0.0100 to 0.00650 M in
100s
.Determine
the rate of appearance of O2 for this period.
A fertiliser company produces ammonia on a large scale at a temperature of 450°C. In this reaction, hydrogen and nitrogen gas are reacted to produce ammonia, which also results in an equilibrium system. The forward reaction, producing ammonia, is exothermic.
If the oxygen gas sample in #1 passed through a drier that decreased the pressure of the mixture to 750 Torr and the pressure exerted by the water vapour is only 80% of the saturated vapour pressure at the given temperature, what would be the pressure of the dry oxygen?
