Question 868110
1 liter of water is 1000 grams of water.

let s = grams of baking soda to use.
{{{s/(1000+s)=0.10}}}
{{{s=0.1(s+1000)}}}
{{{s=0.1s+100}}}
{{{0.9s=100}}}
{{{s=100/0.9}}}
{{{highlight(s=111)}}} grams