Basic concept
What are the two parts of a redox reaction?
What are oxidation and reduction
Name one common developer chemical.
Answer: What is hydroquinone or metol?
What do you call a substance that donates electrons?
What is a reducing agent?
What is the first step after film is placed in developer?
What is exposed Ag⁺ starts getting reduced
What is the name of the invisible image on film before development?
What is the latent image?
What does oxidation involve?
Answer: What is the loss of electrons?
Name a reducing agent used in photography.
What is the developer solution
What is the opposite of a reducing agent?
What is an oxidizing agent?
Which crystals get reduced: exposed or unexposed?
Answer: What are the exposed crystals?
What chemical process turns the latent image into a visible one?
Answer: What is reduction of silver ions?
What does reduction involve?
What is the gain of electrons
What is the role of the fixer
What is to dissolve unexposed silver halides so the image stays permanent
What happens to the oxidation state of silver (Ag⁺) when reduced?
What is it decreases to 0 (metallic silver)?
After development, what chemical removes unexposed crystals?
What is the fixer?
What happens to the developer as it reduces silver ions?
Answer: What is it becomes oxidized?
What must a reducing agent do to reduce another substance?
What is donate electrons?
Why must the developer be basic (alkaline)?
What is to help the reducing agent work effectively?
What is an oxidizing agent?
What is a substance that gains electrons?
What ion becomes metallic silver during development?
What is Ag⁺?
Why don’t unexposed crystals turn into silver?
What is they weren’t hit by light and are not activated?
Describe in one sentence how a photograph becomes visible.
What is exposed silver ions get reduced to metallic silver, forming dark image areas?
What is Ag⁺ on film called before it’s reduced?
What is a silver ion?
Why is redox crucial for film photography?
What is the image forms through electron transfer reactions?
What happens if the developer is oxidized by air before use?
What is the image becomes weak or doesn’t develop well?
Describe in one sentence how a photograph becomes visible.
What is exposed silver ions get reduced to metallic silver, forming dark image areas?