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4 years ago

What is the usual composition of acid etch?

Chemistry

1 answer:

maxonik [38]4 years ago

5 0

Answer:

Here's what I get

Explanation:

The etching gel used in many dental procedures contains

10 % to 50 % phosphoric acid in water
a thickening agent consisting of hydrocarbon polymers and a colloidal silica sol
a colouring agent such as cobalt aluminate blue spinel (CoAl₂O₄) to make it visible on a tooth.

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Will name Brainliest

noname [10]

Answer:

Explanation:

3 0

3 years ago

Plz help me with seven eight and nine

Nookie1986 [14]

7 is atomic symbol 9 is atomic density 8 is the atomic number

4 0

3 years ago

The product of a Lewis acid-base reaction is a(n) __________, a single species that contains a new covalent bond. The Lewis acid

andreyandreev [35.5K]

Answer:

Adduct, donate, accept

Explanation:

Lewis acids are those having suitable vacant orbital for electron acceptance and forming a covalent bond with an electron rich species. Example: $BCl_{3}$ (B has vacant 2p orbital for electron acceptance)

Lewis bases are those having energetically available unshared electrons that can be donated to an electron deficient species and form a covalent bond. Example: $NH_{3}$ (N has energetically available lone pair)

So, product of Lewis acid-base reaction is an adduct ( $BCl_{3}-NH_{3}$ ) where a new covalent bond is formed between B and N.

4 0

3 years ago

A 0.56 M solution of AlCl₃ is determined to have a concentration of particles of 1.79 M. What is the van't Hoff factor for AlCl₃

Crank

Answer:

Van't Hoff factor for AlCl₃ = 3 (Approx)

Explanation:

Given:

Number of observed particular = 1.79 M

Number of theoretical particular = 0.56 M

Find:

Van't Hoff factor for AlCl₃

Computation:

Van't Hoff factor for AlCl₃ = Number of observed particular / Number of theoretical particular

Van't Hoff factor for AlCl₃ = 1.79 M / 0.56 M

Van't Hoff factor for AlCl₃ = 3.19

Van't Hoff factor for AlCl₃ = 3 (Approx)

3 0

3 years ago

Which is the Net Ionic Equation for:

arlik [135]

Answer: $2Fe^{3+}(aq)+3Mg(s)\rightarrow 3Mg^{2+}(aq)+2Fe(s)$

Explanation:

Complete ionic equation : In complete ionic equation, all the substance that are strong electrolyte and are present in an aqueous state and represented in the form of ions.

Net ionic equation : In the net ionic equations, we do not not include the spectator ions in the equations.

Spectator ions : The ions present on reactant and product side which do not participate in a reactions. The same ions present on both the sides.

The complete balanced ionic equation will be:

$2Fe^{3+}(aq)+6Cl^-(aq)+3Mg(s)\rightarrow 3Mg^{2+}(aq)+6Cl^-(aq)+2Fe(s)$

In this equation, $Cl^-$ are the spectator ions.

By removing the spectator ions from the balanced ionic equation, we get the net ionic equation.

The net ionic equation will be:

$2Fe^{3+}(aq)+3Mg(s)\rightarrow 3Mg^{2+}(aq)+2Fe(s)$

3 0

3 years ago