<span>The
scientist thought that the atom was the smallest particle in the universe is
John Dalton. He established the atomic theory which
consists of five; elements are made of extremely small particles called atoms,
atoms of different element have different sizes, mass and physic – chemical
properties, atoms cannot be divided further, destroyed or created, atoms can
combine to form compounds and in chemical reaction, atoms can be combined,
separated or rearranged</span>
Answer:
accepts an H⁺
Explanation:
The following balanced ionic equation is given in this question;
HCl + H₂O → H₃O⁺ + Cl⁻
According to Brønsted–Lowry acid–base theory, a base is any substance that can accept hydrogen ions or protons (H+). Using this definition for the above equation, water (H2O) accepts a proton or H+ that was donated by HCl to form H30+ (hydronium ion), hence, water is acting as a BASE in this reaction because it accepts an H+.
Answer:
Biuret test does not work for all kinds of proteins. It only works with proteins and peptides that have 2 or more peptide bonds.
Explanation:
The Biuret test is used to determine proteins and polypeptides that contain 2 or more peptide bonds.
It is made of potassium hydroxide and cupric sulfate, along with sodium and potassium tartrate.
It consists of treating a protein with Cu ++ in alkaline medium, producing a violet coloration by forming a coordination complex between the Cu ++ and the free electron pairs of the nitrogens of the amino groups of the peptide junction. At least two peptide bonds are necessary for the reaction to take place.
Therefore, this test does not serve to determine the amount of amino acids and peptides with a single peptide bond such as: tyrosine (amino acid), tryptophan (amino acid), alanine (amino acid), aspartame (peptide)