Explanation:
Pineapple juice often shows an unstable cloud and produces a solid precipitate that is not very attractive for consumers. Cloud stabilization by pectin addition is permitted by EU and Codex standards to counteract this effect. This additive must be labeled and its content should not exceed fixed maximum standards (Website of AIJN Code of Practice). Determination of water-soluble pectins by IFU method 26 (Website of International Fruit and Vegetable Juice Association) can be used for control of this parameter. Pectin addition to pineapple juice or juice concentrate, etc. may also be detected after its isolation by 13C isotopic analysis (Hammond, 2006) as explained later.
Molarity is a concentration unit, defined to be the number of moles of solute divided by the number of liters of solution.
A chemical reaction (signs)
- rusting
- change in base of chemical
- for example lets say u mix two chemicals, and then it becomes a different new chemical (it changed from the inside)
a physical
- a physical reaction is outer looks not inside.
- it changes on the outside, like changing a color
By the lloks ofit you cant see it send a better picture
Complete Question
49.9 ml of a 0.00292 m stock solution of a certain dye is diluted to 1.00 L. the diluted solution has an absorbance of 0.600. what is the molar absorptivity coefficient of the dye
Answer:
The value is 
Explanation:
From the question we are told that
The volume of the stock solution is 
The concentration of the stock solution is 
The volume of the diluted solution is 
The absorbance is 
Generally the from the titration equation we have that
=> 
=> 
Generally from Beer's law we have that
=> 
Here l is the length who value is 1 cm because the unit of molar absorptivity coefficient of the dye is 
So
=>
