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3 years ago

What does dry ashing mean

Chemistry

2 answers:

ra1l [238]3 years ago

8 0

Answer:

dry means its does not have water and ashing is like a feeling of ash

Explanation:

aivan3 [116]3 years ago

5 0

Dry ashing refers to the use of a muffle furnace capable of maintaining temperatures of 500–600°C. Water and volatiles are vaporized, and organic substances are burned in the presence of oxygen in air to CO 2 and oxides of N 2. Most minerals are converted to oxides, sulfates, phosphates, chlorides, and silicates. Hope this helped!

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Please help thank you

Fynjy0 [20]

Answer:

Explanation:

8 0

3 years ago

A solution is prepared by dissolving 0.24 mol of butanoic acid and 0.25 mol of sodium butanoate in water sufficient to yield 1.0

beks73 [17]

Answer:

Butanoic acid present in solution

Explanation:

In this case, we have a buffer solution of butanoic acid and sodium butanoate. In other words a reaction like this:

HC₄H₇O₂ + H₂O <------> C₄H₇O₂⁻ + H₃O⁺ Ka = 1.5x10⁻⁵

The low value of Ka means that this is a weak acid. So, after this, the NaOH is added to the solution.

The NaOH is a really strong base, so we might expect that the pH of the solution increase drastically, however this do not occur.

The reason for this is because the first thing to happen in this reaction is an acid base reaction.

The NaOH react with the butanoic acid still present in solution, because is a weak acid, so in solution, this acid is not completely dissociated into it's respective ions. So the butanoic acid reacts with the NaOH and the products:

HC₄H₇O₂ + NaOH <------> Na⁺C₄H₇O₂⁻ + H₂O

So, because of this, the pH increase but not much.

6 0

3 years ago

What is the difference between electronegativity and ionization energy

Katena32 [7]

Answer:

These properties are basically the inverse of each other.

Explanation:

Electronegativity is the tendency of an atom to attract an electron and make it a part of its orbital.

Ionization enthalpy, is the energy required to remove an electron from an atom.

More electronegative atoms have high ionization enthalpies If the energy required to remove an electron is less, i.e. the atom has more tendency to give electron, it would thus have less tendency to take electron.
Values and tendency of electronegativity in the periodic table: In general, the electronegativity of a non‐metal is larger than that of metal. For the elements of one period the electronegativities increase from left to right across the periodic table. For the elements of one main group the electronegativities decrease from top to bottom across the periodic table. To the subgroup elements, there’s no regular rule.
Values and tendency of ionization potential in the periodic table: The first ionization energy is the energy which is required when a gaseous atom/ion loses an electron to form a gaseous +1 valence ion. The energy which is required for a gaseous +1 valence ion to loose an electron to form a gaseous +2 valence ion, is called the second ionization energy of an element. In general, the second ionization energy is higher than the first ionization energy of an element. The first ionization energies of the elements of one period increase from the left to the right across the periodic table. According to the elements of main group, the first ionization energies generally decreases from top to bottom across the periodic table.

7 0

4 years ago

Read 2 more answers

30. What is the Bronsted base of H2PO4- + OH- ⟶HPO42- + H2O?

romanna [79]

Answer:

OH⁻ is the Bronsted-Lowry base.

Explanation:

A Bronsted-Lowry base is a substance that accepts protons. In the chemical equation, OH⁻ accepts a proton from H₂PO₄⁻ to become H₂O. H₂PO₄⁻ would be a Bronsted-Lowry acid because it donates a proton to OH⁻ and becomes HPO₄²⁻.

Hope that helps.

4 0

3 years ago

A 80.0 g piece of metal at 88.0°C is placed in 125 g of water at 20.0°C contained in a calorimeter. The metal and water come to

grandymaker [24]

Answer:

The specific heat of the metal is 0.485 J/g°C

Explanation:

<u>Step 1:</u> Data given

Mass of the piece of metal = 80.0 grams

Mass of the water = 125 grams

Initial temperature of the metal = 88.0 °C

Initial temperature of water =20.0 °C

Final temperature = 24.7 °C

pecific heat of water is 4.18 J/g*°C

<u>Step 2:</u> Calculate specific heat of the metal

Qgained = -Qlost

Q =m*c*ΔT

Qwater = - Qmetal

m(water)*c(water)*ΔT(water) = -m(metal)*c(metal)*ΔT(metal)

with mass of water = 125 grams

with c( water) = 4.18 J/g°C

with ΔT(water) = T2-T1 = 24.7 - 20 = 4.7°C

with mass of metal = 80.0 grams

with c(metal) = TO BE DETERMINED

with ΔT(metal) = 24.7 - 88.0 = -63.3 °C

125*4.18*4.7 = -80 * C(metal) * -63.3

2455.75 = -80 * C(metal) * -63.3

C(metal) = 2455.75 / (-80*-63.3)

C(metal) = 0.485 J/g°C

The specific heat of the metal is 0.485 J/g°C

3 0

4 years ago

What does dry ashing mean​

What does dry ashing mean