Để đánh giá sự nhiễm bẩn PO43- của nước máy sinh hoạt ở một thành phố, người ta lấy 2 lít nước đó cho tác dụng với dung dịch AgNO3 dư thì thấy tạo ra 2,646.10-3 gam kết tủa vàng. Cho N = 14; O = 16; Pb = 31; Ag = 108. Nồng độ PO43- có trong 2 lít nước máy sinh hoạt là
Nguyễn Thị Thảo Vân | Chat Online | |
05/09 22:47:46 (Tổng hợp - Lớp 12) |
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Để đánh giá sự nhiễm bẩn PO43- của nước máy sinh hoạt ở một thành phố, người ta lấy 2 lít nước đó cho tác dụng với dung dịch AgNO3 dư thì thấy tạo ra 2,646.10-3 gam kết tủa vàng. Cho N = 14; O = 16; Pb = 31; Ag = 108. Nồng độ PO43- có trong 2 lít nước máy sinh hoạt là
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Số lượng đã trả lời:
A. 0,6 mg/l. 0 % | 0 phiếu |
B. 0,3 mg/l | 1 phiếu (100%) |
C. 0,4 mg/l. 0 % | 0 phiếu |
D. 0,2 mg/l. 0 % | 0 phiếu |
Tổng cộng: | 1 trả lời |
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