Baking soda vs. baking powder

Baking soda vs. baking powder

I've heard of several different 'solutions' for some unrelated problems, was wondering if you all could clarify for me. Baking soda/powder to absorb odors. (Which one, and is there a difference between the two?) Putting baby/talc powder on shirt collars to prevent collar stains. (I just started a serving job, but I only have one shirt, so I'd like to keep it as nice looking as possible. Would applying baking powder do the same thing?) I've also heard of people using baking soda to wash hair. Along that line, i've also heard of people putting baby powder on hair to absorb grease as a quick fix if you don't have time to shampoo. Anything you know to be true/not? This is such an informative community, i've learned so much. Thanks!
Don’t hate me because I’m beautiful….

Don’t hate me because I’m beautiful….

Picture & picture request

Picture & picture request

What is this life if, full of care

What is this life if, full of care

my new room

my new room

“Mutant” daylily?

“Mutant” daylily?

Strange season

Strange season