您好❤
∵100g28%的NaOH溶液中 m(NaOH)=100g x 28% = 28g
∴m(H)= m(NaOH)x H% = 28g x 1/40 = 0.7g
∴H%= m(H)÷ m(溶液)x 100%=0.7g ÷ 100g x 100% = 0.7%
您好❤
∵100g28%的NaOH溶液中 m(NaOH)=100g x 28% = 28g
∴m(H)= m(NaOH)x H% = 28g x 1/40 = 0.7g
∴H%= m(H)÷ m(溶液)x 100%=0.7g ÷ 100g x 100% = 0.7%