Homework Help

What roles does ammonium dichromate play in photography and lithography?

user profile pic

abe1996 | Student, Grade 10 | (Level 2) eNoter

Posted May 29, 2013 at 7:07 AM via web

dislike 1 like

What roles does ammonium dichromate play in photography and lithography?

1 Answer | Add Yours

user profile pic

sciencesolve | Teacher | (Level 3) Educator Emeritus

Posted May 29, 2013 at 11:08 AM (Answer #1)

dislike -1 like

The use of dichromate compounds in photography and litography is the result of its light-sensitive properties.  The dichromate compounds have also the property of hardening onto paper the pigment that is mixed in arabic gum. The gum bichromate prints have a large variety of colors print and the stability and toughness of the gum bichromate prints is not at all neglectable.

The saturation of n% of ammonium dichromate can be obtained by adding n grams of ammonium dichromate into 100 ml of warm distilled water.

You may obtain ammonium dichromate from the following chemical reaction, such that:

`Na_2Cr_2O_7 + (NH_4)_2SO_4 -> (NH_4)_2Cr_2O_7 + Na_2SO_4`

Join to answer this question

Join a community of thousands of dedicated teachers and students.

Join eNotes