1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Tomtit [17]
3 years ago
5

The structure of haloacetic acids, XCH,COOH (where X is either F.CI, Br, or I), is shown above. The dissociation constants and m

olar masses of four haloacetic acids are listed in the table below
A student titrates 10.0 mL samples of 1.0 M solutions of each of the haloacetic acids with a standard solution of NaOH. Which of the following statements correctly predicts the volume of
NaOH(aq) needed to reach the equivalence point?

a) Fluoroacetic acid will need the smallest volume of NaOH(aq) to reach the equivalence point.

b) lodoacetic acid will need the smallest volume of NaOH(aq) to reach the equivalence point

c) All of the acids will need the same volume of NaOH(aq) to reach the equivalence point.

d) All of the haloacetic acids are weak therefore none will reach an equivalence point.

i will give brainliest !

Chemistry
1 answer:
lana [24]3 years ago
8 0

Answer:

A student titrates 20.0mL of 1.0M NaOH with 2.0M formic acid, HCO2H (Ka=1.8x10-4). Formic ... How much formic acid is necessary to reach the equivalence point? a. ... At the equivalence point, is the solution acidic, basic or neutral? ... By adding a small amount of water to the beaker but not dissolving all of the solid. 11.

Explanation:

You might be interested in
10.0 Points 36 grams of water vapor takes up how many liters at room temperature and pressure (293 K and 100 kPa)?
AVprozaik [17]

100 kpa is correct

:/

8 0
4 years ago
How many electrons are in O2-?
egoroff_w [7]

Answer:

There will be 16 electrons in O2-

5 0
3 years ago
What is the net ionic equation of H3PO4(aq) + Ca(OH)2(aq) yields Ca3(PO4)2(aq) + H2O(l)
aalyn [17]

Answer:

The net ionic equation is:

6 OH⁻(aq) + 6 H⁺(aq) ⇒ 6 H₂O (l)

Explanation:

First it is convenient to determine the cation and the anion in each compound. Cations are the positive ions of a compound and are usually metals. Anions are the negative ions of a compound and are nonmetals.For that it is important to recognize polyatomic ions in a reaction. Polyatomic ions are charged molecules that bind so strongly that they cannot disassociate during chemical reactions. In other words, polyatomic ions are groups of two or more atoms that are chemically linked. These have a specific load and do not separate into individual components. Polyatomic ions can have both positive and negative charges. Some of the most common polyatomic ions are CO₃²⁻, NO₃⁻, NO₂⁻, SO₄²⁻, SO₃²⁻, ClO₃⁻, PO₄³⁻ and OH⁻.

Then you must make sure that the initial equation is completely balanced. To balance an equation, you must add coefficients in front of the compounds to match the amount of atoms of each element on both sides of the equation.

In this case, the final balanced equation after balancing is:

3 Ca(OH)₂(aq) + 2 H₃PO₄(aq) ⇒ 6 H₂O(l) + Ca₃(PO₄)₂(s)

When a species or compound dissociates, it separates into its positive (cation) and negative (anion) components. These will be the components that are balanced at the end for the net ionic equation.

Given that strong acids such as H₃PO₄ and strong bases such as Ca(OH)₂ are completely dissociated, in addition to everything previously mentioned related to polyatomic ions, the net ionic equation will be:

3 Ca⁺² (aq) + 6 OH⁻(aq) + 6 H⁺(aq) + 2 PO₄⁻³(aq) ⇒ 6 H₂O (l)+3 Ca⁺² (aq) + 2 PO₄⁻³ (aq)

In this case it was taken into account that the coefficients located in front of each molecule indicate the amount of each molecule for the reaction and that the subscripts next to each atom or ion is the number of atoms or ions in the equation. By multiplying the coefficient mentioned by the subscript, you get the amount of each element or ion present in the reaction.

The spectator ions are those that are present on both sides of the reaction and are not changed by the reaction, that is, they are present in exactly the same amount on both sides of the equation. In this way, they can be canceled from both sides of the reaction. The spectator ions in this case are PO₄³⁻(aq) and Ca²⁺(aq).

This leaves you with the net ionic equation:

<u><em>6 OH⁻(aq) + 6 H⁺(aq) ⇒ 6 H₂O (l)</em></u>

7 0
3 years ago
Read these I need help with those two
Serga [27]
Can't see it properly.
6 0
3 years ago
What is the volume of 9.5 g fluorine gas, F2, at STP?
Tju [1.3M]

Answer:

5.6L

Explanation:

At STP, the pressure and temperature of an ideal gas is

P = 1 atm

T = 273.15k

Volume =?

Mass = 9.5g

From ideal gas equation,

PV = nRT

P = pressure

V = volume

n = number of moles

R = ideal gas constant =0.082J/mol.K

T = temperature of the ideal gas

Number of moles = mass / molar mass

Molar mass of F2 = 37.99g/mol

Number of moles = mass / molar mass

Number of moles = 9.5 / 37.99

Number of moles = 0.25moles

PV = nRT

V = nRT/ P

V = (0.25 × 0.082 × 273.15) / 1

V = 5.599L = 5.6L

The volume of the gas is 5.6L

5 0
3 years ago
Other questions:
  • 1.)Which of these statements correctly compares probeware (such as an electronic temperature probe) to traditional analog tools
    12·2 answers
  • Bromine (br) has four energy levels. name 2 other elements that would have four energy levels.
    6·1 answer
  • You have a thermometer in your hand and your phone says that the current temperature in your location is 35 degrees C (actual te
    10·1 answer
  • What is the empirical formula of N2O4
    12·2 answers
  • If you want a reaction to happen more quickly, what do the particles inside the reaction need to do?
    5·1 answer
  • Why are some chemical substances, like oil and coal, considered nonrenewable?
    15·1 answer
  • A sample of carbon dioxide is contained in a 250.0 mL flask at 0.917 atm and 19.3 ∘ C. How many molecules of gas are in the samp
    10·1 answer
  • Which environment is characterized by high temperature and low humidity
    5·2 answers
  • This is called what ??
    15·1 answer
  • 5 g of gold and 25 g of silver are mixed to form a single-phase ideal solid solution. (a) how many moles of solution are there?
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!