A 110.0 −mL sample of a solution that is 2.9×10−3 M in AgNO3 is mixed with a 230.0 −mL sample of a solution that is 0.11 M in NaCN. After the solution reaches equilibrium, what concentration of Ag+(aq) remains?
In: Chemistry
In: Chemistry
1) A buffer solution contains 0.356 M
ammonium chloride and
0.396 M ammonia.
If 0.0550 moles of hydroiodic acid are added to 250 ml
of this buffer, what is the pH of the resulting solution?
(Assume that the volume does not
change upon adding hydroiodic acid)
pH=____
2) A buffer solution contains 0.354 M
NaH2PO4 and
0.393 M
K2HPO4.
If 0.0412 moles of sodium
hydroxide are added to 225 mL of this
buffer, what is the pH of the resulting solution ? (Assume that the
volume does not change upon adding sodium
hydroxide)
pH = ___
3) A buffer solution contains 0.341 M
nitrous acid and 0.235 M
sodium nitrite.
If 0.0278 moles of sodium
hydroxide are added to 250 ml of this
buffer, what is the pH of the resulting solution ? (Assume that the
volume does not change upon adding sodium
hydroxide)
pH = ____
In: Chemistry
In: Chemistry
which chemicals that are green (not likely to harm the envionment) and two that are not green?
N-ethylsaccharin, O-ethylsaccharin, ethyl iodide, saccharin, N-sodium saccharin, O-sodium saccharin, NaOH, DMF
In: Chemistry
Draw a structural formula for trans-2-chlorocyclopentanol.
Draw a structural formula for 3-methyl-1-pentanol.
Draw a structural formula for trans-2-bromocyclobutanol.
In: Chemistry
In: Chemistry
Two students beging by mixing 5.0ml of a 3.1M solution of methyl orange and 5.0 ml of a 3.1 M solution of methyl red in an Erlenmyrer flask. How many drops of this mixture must be added to the top of the column so that 6.0 mmol of each dye is separated. 21drops = 1ml
In: Chemistry
Consider the following reaction:
CO(g)+2H2(g)⇌CH3OH(g)CO(g)+2H2(g)⇌CH3OH(g)
The reaction between COCO and H2H2 is carried out at a specific
temperature with initial concentrations of COCO = 0.26 M
M and H2H2 = 0.49 M M. At equilibrium, the concentration
of CH3OHCH3OH is 0.16 M M.
Part A
Find the equilibrium constant at this temperature.
Express your answer using two significant figures.
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In: Chemistry
Balance the following redox equations either in acid or base:
a. HClO -> Cl^(-) + ClO3^(-) [acid]
b. ClO4^(-) + Br2 -> Cl^(-) + BrO2^(-) [base]
c. H2S + BrO3^(-) -> SO3^(2-) + Br2 [base]
d. NH3 + SO4^(2-) -> N2 + SO^(2) [acid]
e. IO3^(-) + H2S -> I2 + SO4^(2-) [acid]
In: Chemistry
In: Chemistry
Are the number of lone pairs of electrons on the central atoms the main factor that's used to determine the molecular shape or geometry?
In: Chemistry
Explain the significance of correlating the microscopic findings with the physical and chemical urinalysis results.
In: Chemistry
What is the definition of an oxidation/reduction reaction? Write down three chemical equations for this type of reaction that occurs in a natural process. Indicate their chemical valences before and after a reaction and point out which chemical species is an oxidant or a reductant in the chemical reaction.
In: Chemistry
Calculate the frequency of the light emitted when an electron in a hydrogen atom makes each of the following transitions. Express in inverse seconds.
a) n=4?n=3
b) n=5?n=1
c) n=5?n=4
d) n=6?n=5
In: Chemistry