[sadelolo123]

I have a solution A of 1g of Red Dye (RMM 479.02) and 0.98L of water what is this concentration?

I then take 10g of solution A and mix it with 100g of Lactose monohydrate to form a mixture B.

I take 1g of mixture B and dilute it with 100ml water to form C.

I take 0.5g of mixture B and dilute it with 100ml water to make mixture D
I take 1.5g of mixture B and dilute it with 100ml water to make mixture E
I take 2g of mixture B and dilute it with 100l water to make mixture F

What is the concentration of C, D, E, F. I am hoping its a simple concentration answer but I ain't sure? I need the concentration for my calibration curve which I will prepare the above standard solution so that i plot absorbance versus concentration. Please help really stuck.

[Arkcon]

Hi there, sadelolo123:, I know you're new to our forum, but I'd like to ask you to carefully read the Forum Rules{click}, and follow them.  You agreed to read and follow them when you signed up, and you're not really doing that.

Start with solution A.  You have a certain mass in a certain volume.  What more do you need to report concentration?  If you need different units, you'll have to convert them, but you don't mention any other units in your post.