Question

Why does demineralization of hydroxyapatite occur faster when in a solution of hydrochloric acid compared to acetic acid? Make sure to use the demineralization equation for hydroxyapatite to explain your answer (Use the generalized demineralization equation with H+ representing the acid)

Ca_{5}(PO_{4})_{3}OH + H^{+}
--> 5Ca^{2+} + 3PO_{4}^{3-}
+H_{2}O

Answer #1

will a reaction occur between (a) nickel metal and
hydrochloric acid and (b) tin metal and solution of aluminum
chloride? Write a balanced equation for each reaction and explain
why a rewction does or does not occur. (For this experiment only,
assume that nuckel and tin will form +2 cations)
Thank you

1. Write the net ionic equation for the reaction that occurs
when a solution of hydrochloric acid (HCl) is mixed with a solution
of sodium formate (NaCHO2).
2. Calculate the equilibrium constant for this reaction.
3. Calculate the equilibrium
concentrations of Na+, Cl?,H+, CHO?2, and HCHO2 when 50.0 mL of
0.35 M HCl is mixed with 50.0 mL of 0.35
MNaCHO2.

BIOCHEM:
Acetic acid has a pKa of 4.76. Starting with a 1.0 M solution of
sodium acetate, and a 1.0 M solution of acetic acid, what volume of
each is required to make 1.0 liter of a 1.0 M solution buffered at
pH 5.1?
Will give a thumbs up if correct. I am not sure what to put in
for "([A-/HA])" from the Henderson-Hasselbalch equation. Please do
explain, thank you.

A
sample of acetic acid (weak acid) was neutralized with .05M NaOH
solution by titration. 34 mL of NaOH had been used. Show your work.
CH3COOH + NaOH-----CH3COONa + H2O
a) Calculate how many moles of NaOH were used?
b) How many moles of aspirin were in a sample?
c) Calculate how many grams of acetic acid were in the
sample
d) When acetic acid is titrated with NaOH solution what is the
pH at the equivalence point? Circle the...

Addition of a strong acid to a solution of acetic acid at
equilibrium (HOAc + H2O <-->
H3O+ + OAc-) would cause the:
a. acetate ion concentration to decrease.
b. acetate ion concentration to increase.
c. pH to increase
d. hydroxide ion concentration to increase.
e. None of the above is correct.
I know the correct answer is a, but I cannot figure out why. If
anyone could explain why this is the answer, I'd greatly appreciate
it!

Write the chemical equation for the ionization of acetic acid.
CH3CO2H + H2O <---> H3O+ + CH3CO2-
From the pH, calculate the concentration of hydrogen ions. ( I
KNOW TO USE THIS ph = -log[H+]) Next, find the
concentration of theacetate ion. (I HAVE NO IDEA HOW TO DO
THIS PART) How would the concentration of hydrogen ion be related
to the acetate ion? (Hint: lookat the formula for acetic acid.)
Considering that acetic acid is the source of hydrogen...

Calcium carbonate, CaCO3, reacts with stomach acid (HCl,
hydrochloric acid) according to the following equation:
CaCO3(s)+2HCl(aq)→ CaCl2(aq)+H2O(l)+CO2(g)
One tablet of Tums, an antacid, contains 500.0 mg of CaCO3.
a) If one tablet of Tums is added to 34.5 mL of a 0.250 M HCl
solution how many liters of CO2 gas are produced at STP?
Express your answer with the appropriate units.

Hydrochloric acid (HCl) is considered a strong acid. For many
problems, it is convenient to assume that it completely dissociates
to H+ ions and Cl− ions. But how good is this assumption? As a way
to find out, calculate the relative error that results when one
makes this assumption with a 0.1 M solution of HCl. Report your
answer as a percent to one significant figure, and include the
proper sign. Recall that relative error (in this context) is as...

Explain why the reaction proceeds faster when sodium
hydroxide is added to naphthol. Use resonance contributors to
explain the difference in reactivity between 2-naphthol in neutral
solution and 2-naphthol in basic solution.

Zinc metal reacts with hydrochloric acid according to the
following balanced equation. Zn(s)+2HCl(aq)→ZnCl2(aq)+H2(g) When
0.107 g of Zn(s) is combined with enough HCl to make 51.6 mL of
solution in a coffee-cup calorimeter, all of the zinc reacts,
raising the temperature of the solution from 22.2 ∘C to 24.3 ∘C.
Find ΔHrxn for this reaction as written. (Use 1.0 g/mL for the
density of the solution and 4.18 J/g⋅∘C as the specific heat

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