isabeljackson562
07.04.2021 •
Chemistry
50 points please help
Solved
Show answers
More tips
- C Computers and Internet 3D Glasses! What is this thing?...
- C Computers and Internet How to insert videos into LiveJournal?...
- C Computers and Internet How Much Does an iPhone Cost in America?...
- F Family and Home How to Choose the Best Diapers for Your Baby?...
- F Family and Home Parquet or laminate, which is better?...
- L Leisure and Entertainment How to Properly Wind Fishing Line onto a Reel?...
- L Leisure and Entertainment How to Make a Paper Boat in Simple Steps...
- T Travel and tourism Maldives Adventures: What is the Best Season to Visit the Luxurious Beaches?...
- H Health and Medicine Kinesiology: What is it and How Does it Work?...
- O Other How to Choose the Best Answer to Your Question on The Grand Question ?...
Answers on questions: Chemistry
- C Chemistry Data Table 7 Compound | Temperature, °C | | Ksp | | | \/ \/ \/ AgCI 4.7 0.21 x 10-10 AgCI 9.7 0.37 x 10-10 AgCI 25 1.56 x 10-10 AgCI 50 13.2 x 10-10 AgCI 100 215 x 10-10 From the data...
- C Chemistry How many covalent bonds are generally formed by atoms with five valence electrons?...
- C Chemistry Let 4 moles of methanol (liquid) combust in 3 moles of gaseous oxygen to form gaseous carbon dioxide and water vapor. suppose this occurs in a chamber of fixed volume and fixed temperature....
- C Chemistry Combustion reactions involve reacting a substance with oxygen. when compounds containing carbon and hydrogen are combusted, carbon dioxide and water are the products. using the enthalpies...
- C Chemistry If it takes 645 j of energy to warm a 5.51-g sample of water, how much energy would be required to warm 55.1 g of water by the same amount?...
- C Chemistry Earth s surface is constantly changing. Volcanoes erupt and form new crust. Lithospheric plate motions bend and crack old crust and cause earthquakes. Where do most of Earth s earthquakes...
- E English Identify the type of sentence marisol and blakely love to read science fiction books....
- H History Why was adding amendments to the constitution made a difficult task...
- S Social Studies Is my answers correct ,just want to be sure....
- P Physics What are the main causes of the convention currents in the asthenosphere? a. weight and pressure b. temperature and pressure c.density and temperature i think its c...
Ответ:
ur a f.a.g.g.o.t
Ответ:
The color of solution at the end point will be blue.
Explanation:
EBT is used as an indicator for complexometric titrations and acts as a chelating agent. It has a blue color, in its free form, when the pH is adjusted to 10.
On the addition of CaCl₂, EBT binds with Ca(II) and gives a red color, due to its EBT-Ca (II) complex. So, the color at the start of the titration is red.
When EDTA is added, it starts to form EDTA-Ca(II) complex. Near the endpoint, it starts to replace EBT bound to Ca, because it has a higher formation constant (Kf) for its EDTA-Ca(II) complex than EBT-Ca(II) complex. The EDTA-Ca(II) has no color so the solution shows the colour of free EBT, which is blue. Hence the color at the endpoint will be blue.