The concentration of bleach solutions sold in stores has changed throughout the country. The new, stronger bleach solution available in many stores is now 8. 25% sodium hypochlorite solution. The former concentrated bleach is no longer available at many stores. The new 8. 25% solution is being produced by both brand name companies as well as companies that produce generic products.
The new 8. 25% bleach concentration is thirty percent more concentrated than the former bleach. What was the approximate % by mass concentration of the old bleach?
A) 4. 93%
B) 5. 85%
C) 6. 35%
D) 5. 28%
